BIO 203 Lecture 2: bio 203 chapter 2

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emily

7 Feb 2019

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Everything that takes up space and has mass is called matter. All matter is made of atoms, each containing a nucleus with protons and neutrons surrounded by a cloud of electrons. An element is a form of matter that can"t be broken down into simpler substances. Made up of many atoms that are all the same. Each element has an atomic number and atomic mass. Atomic number: the number of protons in the nucleus. Atomic mass: the number of protons plus the number of neutrons, as electrons have an insignificant mass. Elements with the same number of protons but different numbers of neutrons are called isotopes. All carbon atoms have six protons in the nucleus. Two or more elements may combine to form a compound. A compounds characteristics are usually different from those of the individual elements. The atoms in a compound are held together by chemical bonds. Covalent bonds: form when 2 or more atoms share electrons.

Related Questions

12. What is the primary aim of the scientific method? A. To formulate a hypothesis B. To introduce new variables into an ExperimentC. To include control groups in an experiment D. To modify an Experiment E. To discard the results if they do not support the hypothesis.

13. Supporters of spontaneous generation believe in the theory of biogenesis. True or false14. Louise pastors experiments discounted the theory of abiogenesis true or false

15. Hey Siri is a? E. Collection of statements, for positions, or concepts that explain or accounts for a natural event B. Prediction C. Process of experimentation D. Tentative explanation to account for what has been observed or measured 16. Joseph Listerâs concept of a sepsis in the medical setting consisted of what procedure? A. The practice of the handwashing B. The use of an autoclave C. Do use of antibiotics D. Do use of gloves 17. Which of the following is the largest in size? A.Escherichia coli(bacteria)B. Amoeba proteus (protozoa)C.Poliovirus (virus) D. Mycobacterium tuberculosis/Tuberculosis E.Bacillus anthacis/Anthrax

19. The smallest and most specific of the levels of classification is species. What level of classification is directly above species A.period domainB.familyC. Genus D. Phylum20. What time refers to the degree of evolutionary relatednessBetween living organisms? A. Morphology B. Physiology C. Hierarchy . Phylogeny

21. Which of the following statements regarding evolution is correct? A. Change is that favor survival or lost B.Living things change rapidly through millions of yearsC. Evolution results and structural and functional changes in organisms D. Changes that are not beneficial are preserved 22. Who is fox used what cell component in the classification of organisms into three domains? A.mRNA B.Protiens C.rRNA D.none of the above

23. Micro organisms can be found in all natural habitats. This defines micro organisms as being? A. Microscopic B. Eukaryotic C. Parasitic D. ubiquitous

24. The prokaryotic cell structure includes A. Nucleus, mitochondria B. Ribosomes, cell membranes C. All of the above D. None of the above

25.Regarding the involvement of micro organisms and energy and nutrient flow

A. Bacteria and fungi are important and decomposition

B. Algae are characterized as photosynthetic

C. All of the above are correct

D. None of the above is correct

26. The terms parasite, hots, pathogen, biofilms, and epidemiology are associated with:

A. The role of microorganisms in defomposition

B. The role of microorganisms in bio-remediation

C. The role of viruses in the infectious disease process

D. The role of microorganisms in the infectious disease process

E. None if the above

27. The scientific method can be summarized as:

A. A process

B. Observation, hypothesis, experiment, assessment of data, conclusion

C. All the above

28.in the development of medical microbiology;

A.ferdinand Cohn discovered heat-resistant bacterial spores

B. Robert Koch linked specific organism to specific diseases

C.louis pasteur and Roberts clutch advance the germ theory of disease D. All of the above are correct E. None of the above is correct number

29 the formal system of organizing classifying and naming organisms is called A. Morphology B. Physiology C. Here Archie D. Phylogeny E. None of the above number

30. The horse fox system of classification containâs a. The domains you Eukarya, archaea, bacteria

B. The kingdoms plants, fungi, animals, protists, Monerans, C. All of the above D. None of the above

Chapter No. 2

31. The simplest form of matter not the visible into simpler substances is? 32. Positively charged subatomic particles are? 33. Neutral subatomic particles are? 34. Negatively charged subatomic particles? 35. A pure substances with a chair at the rustic number of protons, Neutrons, and electrons? 36. The atomic number? 37. The number of protons and neutrons is the? 38. Verriant forms of the same element that differ in the number of neutrons are? 39. The space surrounding the atomic nucleus where electrons are likely to be found? 40. A chemical substance that results from the combination of two or more Adams? 41. Chemical? Are formed when two or more atoms share, donate, or except electrons to form molecules. 42. Chemical bonding where electrons are shared among Adams are? 43. Chemical bonding where electrons are transferred to one Adam forming positively charged cations and negatively charged and ions? 44. Chemical bonding that is described as weak bonds between hydrogen and other Adams?

45. Regarding covalent, ionic, and hydrogen bonds, the following is true a period is covalent bonds electrons are shared among Adams be. In ionic bonds, electrons are transferred to one Adam forming (+) cations and (-) anions C. Hydrogen bonds are weak bonds between hydrogen and other Adams D. All of the above are correct E. None of the above are correct 46. Reactants also called substrates are molecules that start a reaction and products are substances left by a reaction. True or false 47. The pH scale express is the concentration of H plus ions, and it ranges from A.0 to 7 B. 1 to 14 C. 0 to 14 D. None of the above 48. Organic chemicals are compounds containing carbon bonded to nitrogen Adams. True or false 49. Carbon see is the fundamental element of life and eight. Contains four Adams and itâs our orbital be. Can form single, double, or triple covalent bonds see. Can form linear, branched, Or ringed moleculesD. All of the above are correct E. None of the above are correct 50. Biochemicals are organic compounds produced by living things and include A Carbohydrates B. Lipids C. Proteins D. Nucleic acidâs E. All of the above are correct letter F. None of the above are correct51. In Marco molecules large are compounds assembled from smaller subunits. A monomer is a subunit and a polymer is a chain of monomers. true or false

52. Proteins pre-dominant molecules and cells,There monomers are the 20 amino acids, and there are polymers are peptides, polypeptides, proteins. There are some units are linked by peptide bonds. Which of the following protein characteristics are true A proteins fold into very specific 3-D shapes B proteins function as support, enzymes, transport, defense, movement C all of the above are correct D none of the above are correct 53. DNA the deoxyribonucleic acid. DNA is formed by two long poly nucleotide strands linked by hydrogen bonds, the following is also threw a. A, C, C, GR nitrogen bases B. The DNA molecule is a double helix C. DNA functions as hereditary material

D. All of the above are correct E. None of the above are correct chapter 4. 54. Peptidoglycans, dipicolinic acid, and mycolic acid are chemicals. They are: Letter a. Associated with cell Walls and their function is protection B. Associated with the cell membranes and their function is protection C. All of the above are correct D. None of the above are correct 55. Steroids are chemicals found in pleomorphic Mycoplasma plasma. They are: E. Associated with cell walls and their function is protection B. Associated with the cell membrane and their function is protection C. All of the above are correct D. None of the above are correct 56. The cell membrane cytoplasmic membrane A. Has a phospholipid Byler B. Has it embedded proteins C. Is the conceptualized in the fluid Mosaic model D. All of the above

57. Which of the following is incorrect regarding the bacterial cell wall? Hey. Is it a target of certain antibiotics B. It determines the shape of the bacterium C. It prevents a bacterium from bursting due to changes in osmotic pressure D. Itâs comeposition where is among the major bacterial groups E. It is composed of repeating framework of lipids 58. Which of the following is incorrect regarding plasmids? E. They are extra chromosomal B. They Can become integrated into the bacterial chromosome C. They can come for protective traits D. They are essential for bacterial growth and survival E. They are important in genetic engineering techniques 59. Identification of bacteria requires a study of all but which of the following? A. Microscopic and macroscopic morphologyB. Bacterial physiology C. Quantitive analysis D. Serological analysis E. Genetic and molecular analysis

60. What is the structure of each of these functions

60. Adhesion 61. Proteins Synthesis 62. Selective permeability 63. Protective, pathogenicity 64. Site of mini bio chemical reactions 70 to 80% water 65. Iocomotion, chemotaxis 66. Nutrient storage (glycogen,PHB)

67. Conjunction 68. Protection from dehydration 69. Heat resistance(linked to calcium and dipicolinic acid) 70. Play a role infected catheters ,IUDs, artificial hip joints

Here are the key Structures for Questions 60 to 70

KEY:Flagella, endospores, so membrane, inclusion body, cytoplasmic matrix, ribosomes, cell-capsule, fimbriae, slime layer, Pilus, biofilms

Chapter No. 5

What are the eukaryotic structure of each of these functions

71. Generation of energy ATP 72. Site of ribosomes in you create excels 73. Locomotion 74. Location of chromosomes and nucleolus75. Convert sunlight energy into chemical energy such as algae and plants 76. Synthesis of nine proteins such as lipids 77. And enzyme found in tears saliva 78. Contains a verity of enzymes79. Collects and packages proteins

Here are the key for question 71 through 79

KEY:Lysosome, mitochondria, nucleus, lysozyme, Goldi-apparatus , flagella, cilia,pseudopia, PER, SER, chloroplasts, nucleus

80. Helminthes include: A. Roundworms(Nematodes) B. Tapeworms (cestodes)C. Flukes(Trematodes) D. all of the above E. None of the above

81. The cell walls of fungi are composed of what? A. Peptide Dougla can be. Chitin or cellulose C. All of the above D. None of the above

82. Where does RNA synthesis in Eukaryotes occur?

83. Asexual reproduction in fungi occurs by what process? A. Binary fission B. Meiosis C. Nuclear fusion D. Mitosis

84. Which of the following defines a lysosome? A. The Sicle that originates from the gold Golgi apparatus and contains a veriety of enzymesB a membrane bound sack contains fluids or solid particles to be digested see. A buck you all that contains reserve nutrients D. A vac you are that regulates osmotic pressure 85. Which of the following is correct regarding chloroplasts? K. They are the primary producers of organic nutrients B. They are found In LG and plant cells letter C. Oxygen gas is produced as a byproduct of their activities D. They convert the energy of sunlight into chemical energy through photosynthesis E. All of the above are correct.

89. All fungi utilize what as a nutritional substrate? A. Organic nutrients be. Carbon dioxide C. Inorganic ions D. Hydrant sulfide

86. What is formed when hyphae of two opposite fungi strains fuse in form diploidy spores?Sporangium, ConidiaB. Basidiospores, zygospores, Ascospores

C.All of the above are correct 87. What statement regarding the fungi is incorrect? E. Many species are pathogenic to field crops B. Fungi decomposed organic matter in return essential minerals to the soil C. They can be used to produce large quantities of antibiotics, alcohol, anod vitamins D. All of the above are correct E. All of the above are incorrect

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Material Science

Question 1

Muscle fibers slide smoothly across each other in both directions.

True

False

Question 2

Cell membranes are composed of single layers of fat molecules.

True

False

Question 3

In mammals, the percentage composition of fats and minerals is roughly the same.

True

False

Question 4

Both RNA and DNA have a double helix structure.

True

False

Question 5

The primary constituents of muscles are

	a)	the proteins kerotin and actin
	b)	the proteins lycine and actin
	c)	the proteins actin and liposine
	d)	the proteins glycine and lycine
	e)	the proteins myocin and actin

Question 6

Hydroxyapatite is a component of endoskeletons.

True

False

Question 7

There are thousands of types of amino acids.

True

False

Question 8

Amorphous silicon is a component of some biomaterials.

True

False

Question 9

The biosynthesis of both collagen and polysaccharides starts in the cell nucleus.

True

False

Question 10

After going through alkyline hydrolysis, the remaining solids are primarily hydroxyapatite.

True

False

Question 11

Calcium carbonate is a mineral found in some biomaterials.

True

False

Question 12

Proteins, chitin, and cellulose are build up from proteins

True

False

Question 13

There are thousands of types of proteins.

True

False

Question 14

Chitin is the most abundant natural polymer.

True

False

Question 15

Keratin is formed from a structure of living cells.

True

False

Question 16

Some biopolymers are hard.

True

False

Question 17

Polymeric biomaterials are comprised of collagen and elastin.

True

False

Question 18

Cell membranes are made of double layers of proteins.

True

False

Question 19

Which is NOT an example of a hard biopolymer?

		a)Eggs
		b)Insect Shells
		c)Hooves
		d)Nails
		e)Cellulose

Question 20

Polysaccharides are built up hierarchically from amino acids.

True

False

Question 21

Unit cells have faces that are

	a)	rhombus
	b)	square
	c)	rectangular
	d)	parallelegrams
	e)	circular

Question 22

Unit cells are

		a)the building blocks of crystalline material
		b)the building blocks of DNA
		c)the building blocks of polymers
		d)the building blocks of amorphous materials
		e)the building blocks of biomaterials

Question 23

Which radioactive semi-metal is the only element with a Simple-Cubic (SC) structure?

		a)Polonium
		b)Uranium
		c)Radium
		d)Plutonium
		e)Dilthium

Question 24

The common crystal structures in metal are

		a)FCC, BCC, HCP
		b)FCC, BCC, HCP, and SC
		c)HCC, BCC, FCP
		d)HCC, BCC, FCP and SC
		e)FCC, SEC, BCC

Question 25

Diffraction results in

		a)constructive interference
		b)delamination of the planes
		c)reverse polarization
		d)altered planar spacing
		e)destructive interference

Question 26

Unit cell indexing schemes provide

		a)location information for grain boundaries
		b)descriptions of the atoms, planes, and axis directions
		c)diffraction indexes for the crystal material
		d)the location of the unit cell in the larger crystalline matrix
		e)the packing arrangement

Question 27

Hexagonal crystal structures cannot be close-packed.

True

False

Question 28

To determine crystal structure and spacing, scientists use

		a)magnetic resonance imaging
		b)X-ray diffraction
		c)optical microscopes
		d)scanning electron microscopes
		e)atomic force microscopes

Question 29

A scanning probe (aka atomic force) microscope can be used to image and manipulate individual atoms.

True

False

Question 30

Crystal planar density is taken as

		a)the number of atoms per unit area for a plane
		b)the planar stacking order
		c)the number of atoms that are closely packed
		d)the number of equivalent atoms per unit cell
		e)the number of atoms per unit length for an axis

Question 31

The atomic packing factor represents

		a)the mass ratio of the unit cell
		b)the number of nearest-neighbor atoms
		c)the fraction of solid sphere volume in the unit cell
		d)the unit cell edge length (a) divided by the atomic radius (R)
		e)the density of the material

Question 32

When an elemental solid can have more than one crystal structure, it is said to have

		a)allotropy
		b)polymorphism
		c)polytropy
		d)elemorphism
		e)anthropomorphis

Question 33

The crystallographic linear density

		a)is determined by the atomic packing factor
		b)is six for HCP unit cells
		c)is five for BCP unit cells
		d)is determined by the coordination number
		e)is how many atoms lie along a unit length in that direction

Question 34

Bragg's law specifies

		a)the condition for when electrons will be refracted upon striking a crystal
		b)the condition for when light will be polarized upon striking a crystal
		c)the condition for when x-rays will be absorbed upon striking a crystal
		d)the condition for when x-rays will be refracted upon striking a crystal
		e)the condition for when light will be refracted upon striking a crystal

Question 35

Two features of a crystal unit cell structure are

		a)atomic number and elemental packing factor
		b)the number of interstitial and host atoms
		c)coordination number and atomic packing factor
		d)the number of faces and the number of atoms
		e)the number of substitutional and interstitial atoms

Question 36

Imperfections in semiconductors are used to create transistors and other electronic devices.

True

False

Question 37

The majority of crystalline solids are single crystals

True

False

Question 38

The grain structure of a polycrystalline material can be observed in the material without significant preparation.

True

False

Question 39

There are three types of electron microscopes, Transmission (TEM), Scanning (SEM), and Tunneling (TUEM).

True

False

Question 40

Defects are important for solid catalysts

True

False

Question 41

The mean intercept length is a measure of grain diameter.

True

False

Question 42

Imperfections in materials do not generally change their properties.

True

False

Question 43

The mean intercept length is computed from the average length of a grain boundary edge.

True

False

Question 44

Catalysts chemically combine with the reactant molecules in order to speed up the reaction.

True

False

Question 45

For a particular material, the higher the temperature the greater the number of vacancies.

True

False

Question 46

A twin boundary is a linear defect where the screw angles on each side of the boundary are equal.

True

False

Question 47

The regular pattern of crystal order is disrupted at a grain boundary.

True

False

Question 48

Solid solutions can only be formed by liquid material cooling to a solid.

True

False

Question 49

Alloys do not usually have significantly difference properties of the constituent metals.

True

False

Question 50

When an atom is missing from a crystal structure position, it is referred to as a self-interstitial.

True

False

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Question 1 An unknown element is found to contain 45 protons and an atomic mass of 64, what is its atomic number? A It cannot be determined. B 19 C 45 D 64 Question 2 The square above is based on the eye color of two parents, one of whom has brown eyes and carries the recessive gene for green eyes (a). What is the probability that a biological child of these parents will have brown eyes? A 0% B 25% C 50% D 100% The spleen functions are part of the _____ system. Which of the following completes the sentence above? A digestive B lymphatic C endocrine D circulatory Question 4 Which of the following is an example of deductive reasoning? A Only 21% of a townâs population have expressed a desire to ban all cars. Therefore, the new proposition banning cars in the state is not likely to pass. B People who brush their teeth regularly have fewer instances of heart disease. Therefore, good dentistry can prevent heart attacks. C All soccer players who play professionally can kick well. Therefore, any future soccer player who is recruited to play professionally will be able to kick well. D All secretaries are good typists. Cynthia is a secretary. Therefore, Cynthia is a good typist. Question 5 Which of the following is a possible cause of herniation of discs? A hepatitis B whiplash C plantar fasciitis D ulcer Question 6 Which of the following is a characteristic of the autonomic nervous system? A It regulates the voluntary control of body movements through the skeletal muscles. B It is the part of the nervous system consisting of the brain and spinal cord. C It regulates involuntary activity in the heart, stomach, lungs, and intestines. D It is thought to be the center of intelligence. Question 7 During photosynthesis, which two compounds are combined to create the output of glucose and oxygen? A Carbon dioxide and water. B Carbon dioxide and bicarbonate. C Bicarbonate and water. D Carbon dioxide and multiple alkaline substances. Question 8 Questions 8 & 9 are based on the following diagram: Which of the following is true about the frog? A It is a member of the salamandridae family. B It is a type of amphibian. C It is a non-vertebrate. D It is closer to most tetrapods than to most newts. Question 9 Questions 8 & 9 are based on the following diagram: Which statement can be inferred about amphibians? A All amphibians are salamandridae, but not all salamandridae are amphibians. B Some amphibians are vertebrates, but not all amphibians are vertebrates. C Some salamandridae are amphibians, but not all amphibians are tetrapods. D All amphibians are vertebrates, but not all vertebrates are amphibians. Question 10 What would this diagram be useful for? A determining outcomes for potential infection B diagnosing an infectious disease C controlling the spread of disease in undeveloped countries D training nurses to detect early onset symptoms of disease Question 11 What type of bond between the complementary bases of DNA stabilizes the double helix structure? A covalent B ionic C hydrogen D nuclear Question 12 Which of the following subatomic particles are found inside of an atomâs nucleus? A electrons, neutrons, protons B neutrons, protons C electrons, protons D electrons Question 13 Which of the following statements is true regarding trophic levels? A Tertiary consumers acquire more energy content than secondary consumers. B Producers acquire less energy than primary consumers. C Secondary consumers acquire more energy than primary consumers. D Tertiary consumers acquire less energy than primary consumers. Question 14 Why does the human eye perceive a red colored dress as the color red? A The molecules of the dress do not absorb red light wavelengths. B The molecules of the dress absorb green and blue light wavelengths. C A red dress will primarily absorb red light wavelengths. D A red dress will not absorb light wavelengths from non-red colors. Question 15 In a lab experiment designed to test the rate at which plants grow under artificial light, the kind of light used is which type of variable? A dependent B independent C random D responding Question 16 Which organ system is primarily responsible for regulating metabolism, mood, and growth? A respiratory system B digestive system C endocrine system D lymphatic system Question 17 In a vacuum, why doesnât an elephant accelerate faster than a penny as it falls to the ground? A Vector components of an elephant are more complex than those of a penny. B An elephant is not a projectile, while a penny is. C They both have an acceleration of 9.8 m/s2. D The elephant is greater in mass but is slowed less by the effects of air resistance. Question 18 Which train described below would have the greatest momentum? A A 9500 kg train car moving at 200 mph B An 8000 kg train car moving at 215 mph C A 9300 kg train car moving at 190 mph D A 8600 kg train car mobbing at 195 mph Question 19 A scientist found that when an invasive species was introduced into a river, the population of salmon native to the region decreased. The type of correlation between these two populations could best be described as A a direct relationship. B an inverse relationship. C a direct and indirect relationship. D no decisive relationship. Question 20 The addition of a catalyst to a chemical reaction will have what effect? A Increase the energy required for the reaction to take place. B Increase the time required for the reaction to take place. C Increase the rate at which the reaction takes place. D Reduce the amount of products in the reaction. Question 21 The pharynx is part of what body system? A respiratory B muscular C lymphatic D circulatory Question 22 Which of the following is true about eukaryotic cells? A They do not contain lysosomes. B They contain one chromosome. C They do not contain a nucleus. D They contain mitochondria. Question 23 What characteristic of an element determines its specific isotope? A Number of protons. B Number of neutrons. C Number of electrons. D Number of quarks. Question 24 What is NOT true about RNA? A It contains a sugar called ribose. B Thymine is not one of its base pairings. C It is unstable in alkaline conditions. D Its sugar is more reduced than DNAâs sugar. Question 25 Which of the following scenarios would NOT give a normal distribution? A A distribution of the yearly income of families in the U.S. B The distribution of heights in a large sample of people. C The percentage of toxic wastes and pollution in the atmosphere vs. the lifespan of organisms in the location. D A curve with 97% of the population within the first two standard deviations. Question 26 In a cell, the Golgi apparatus is found in what location? A Inside the nucleus B Inside the mitochondria C In the cell wall D In the cytoplasm Question 27 Which taxonomic rank is the next-smallest after Order? A Phylum B Family C Species D Genus Question 28 In plants, ________ involves the formation of a _____? A cytokinesis, cleavage furrow B telophase, cell plate C cytokinesis, cell plate D prophase, DNA Question 29 Which base is NOT found in DNA? A guanine B cytosine C uracil D adenine Question 30 Which of the following layers of the atmosphere is the closest to space? A troposphere B stratosphere C mesosphere D thermosphere Question 31 Which is NOT one of the four basic types of tissue? A parenchyma B epithelial C nervous D connective Question 32 The stomach is _____ to the small intestine. Which of the following correctly completes the sentence above? A lateral B superior C posterior D proximal Question 33 Which of the following is the atomic mass of an atom containing 42 protons, 42 electrons, and 37 neutrons? A 42 B 79 C 84 D 121 Question 34 A patient who has suffered head trauma is not able to recognize people he has met around an hour earlier but is still able to recognize people he met before the injury. He most likely has damage to the: A Medulla Oblongata B Corpus Callosum C Hippocampus D Pituitary Gland Question 35 What process is illustrated in the diagram above? A meiosis B mitosis C replication D codification Question 36 Of the following, which is not a type of chemical bond? A ionic B covalent C polar D magnetic Question 37 If the amount of hydrogen in a balloon of fixed size is doubled, what happens to the mass and density of the balloon? A The mass and density both decrease. B The mass increases, but the density decreases. C The mass decreases, but the density increases. D The mass and density both increase. Question 38 If you have 200 mL of a 60% sodium chloride solution, how much NaCl is dissolved in the solution? A 20 g B 50 g C 80 g D 120 g Question 39 How many carbon dioxide molecules are required to balance the following reaction: 4C6H12O6 + 24O2 â _CO2 + 24H2O + Energy A 4 B 8 C 16 D 24 Question 40 The graph above records the death rate of two types of male flies a certain number of days after a chemical pesticide is sprayed. What is the probability a male methuselah fly will be alive 75 days after exposure to the pesticide? A 1/2 B 1/3 C 1/4 D 1/5 Question 41 A scientist wants to write an equation using the variables X, Y, and Z. What is the proper relationship between the variables if X represents time, Y represents energy, and Z represents power? A 2XY = Z B XZ = 2Y C Z = X/Y D Z = Y/X Question 42 What type of correlation is presented between price and quality? A strong direct correlation B weak direct correlation C strong indirect correlation D no correlation Question 43 What type of cells result from mitosis? A one diploid cell B two haploid cells C two diploid cells D four haploid cells Question 44 Cheetahs, rainbow trout, and inchworms belong to the same A Kingdom B Phylum C Class D Order Question 45 The presence of which hormone would NOT cause an increase in water retention? A Renin B ANP C ADH D Aldosterone Question 46 In which part of the heart does oxygenated blood flow out of? A Right ventricle B Left ventricle C Right atrium D Left atrium Question 47 Which of the following hormones are secreted directly by the hypothalamus? A melatonin B oxytocin C dopamine D calcitonin Question 48 Which of the following terms do these diagrams NOT portray? A Active transport B Facilitated Transport C Antiporter D Ion Channel

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BIO 203 Lecture 2: bio 203 chapter 2

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