BSC 1011 Lecture 4: BSC_Unit_4_Exam_SG

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nicoleh

1 Dec 2021

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Document Summary

1: metamerism = segmentation, homonomous w/ metameres = segments, which are essentially repeated morphologically (segments that look the same) Setae = chaetae: made out of chitin b. spike-like structures or hairs used for support & movement. Parapodia: fleshy feet on the side that setae attaches to. 4: closed circulation, can also have green blood, open: blood travels in vessels temporarily when it bathes the tissues directly. The direct interface of c. the blood with tissues is called the hemocoel. Typically (not always) associated with those animals with extensive metabolic demands i. ii. Most; heart is segmented & has hemoglobin like humans. 5 total hearts: metanephridia: another word for kidney, & is found in every segment, coelom: expansive; reached the greatest kind of development, movement, crawling: has longitudinal & circular muscles b. Trochophore larva: found in both annelids & mollusks that provides evidence for evolutionary links. Entirely marine a. b: well-developed head d. e.

Related Questions

QUESTION 19

Among all protostomes, which morphological trait is most varied?

		type of symmetry
		type of body cavity
		number of embryonic tissues
		type of development

1 points

QUESTION 20

Nematodes are acoelomate animals.

True

False

1 points

QUESTION 21

The first genetic material on Earth was probably __________.

		DNA produced by reverse transcription
		DNA molecules whose information was transcribed to RNA
		protobionts
		self-replicating RNA molecules

1 points

QUESTION 22

Free point. Mark "true"

True

False

1 points

QUESTION 23

Which of the following is a characteristic of a flagellate?

		The use of pseudopods as feeding structures.
		They are often multinucleate.
		They can exchange genetic material with other ciliates by the process of mitosis.
		Most live as solitary autotrophs in fresh water.

1 points

QUESTION 24

The chelicerates have 2 pair of antennae.

True

False

1 points

QUESTION 25

Nematoes and arthropods both _________________.

		develop an anis from the blastopore formed during gastrulation
		are suspension feeders
		grow by shedding their exoskeleton
		have ciliated larva

1 points

QUESTION 26

If a lung were to be found in a mollusc, where would it be located?

		incurrent siphon
		mantle cavity
		visceral mass
		excurrent siphon

1 points

QUESTION 27

True segmentation (metamerism) evolved 3 seperate times.

True

False

1 points

QUESTION 28

The first coelomate animals are the _______________________________.

		Nematoda
		Platyhelminthes
		Mollusca
		Arthropoda

1 points

QUESTION 29

Several scientific laboratories across the globe are involved in research concerning the origin of life on Earth. Which of these questions is currently the most problematic and would have the greatest impact on our understanding if we were able to answer it?

		How can amino acids, simple sugars, and nucleotides be synthesized abiotically?
		How did RNA sequences come to carry the code for amino acid sequences?
		How could polymers involving lipids and/or proteins form membranes in aqueous environments?
		How can RNA molecules act as templates for the synthesis of complementary RNA molecules?

1 points

QUESTION 30

The greatest number of endemic species is expected in environments that are _____.

		easily reached and ecologically diverse
		isolated and show little ecological diversity
		isolated and ecologically diverse
		easily reached and show little ecological diversity

1 points

QUESTION 31

A population of organisms will not evolve if _____.

		all individual variation is due only to environmental factors
		the environment is changing at a relatively slow rate
		the population size is large
		the population lives in a habitat without competing species present

1)Mushrooms and other fungi were once lumped in with the plant kingdom. Modern science has separated them into their own kingdom. Kingdom Fungi is distinguished from Kingdom Plantae by the fact that unlike plants fungi.

A)grow a haploid multicellular form from a haploid spore

B)have no cell walls

C)grow, rather than locomote, toward resources

D)are absorptive heterotrophs.

E)have no haploid multicellular stage

2)Members of the Kingdom Fungi are easily distinguished from the Kingdom Plantae because the Fungi

A)Do not have photosynthtic pigments.

B)Are mostly not adapted for living on land

C)Do not have cell walls

D)are primarily unicellular

E)All the above

3)Which of the following would NOT be part of a lichen?

A)chlorophytes

B) zygosporangia

C) basidiocarps

D)Soredia

E)Asci

4)The process of metamorphosis transforms a ______ into a ______________.

A)larva; sexually mature adult

B) blastopore;mouth

C)pseudocoelom; true coelom

D)zygote;blastula

E)blastula;gastrula

5)Which of the following tissues or structures could NOT be derived from ectoderm?

A) all but the digestive tract of a jellyfsh

B) all thin skin of a platyhelminth

C)the brain of a squid

D) the muscles of a nematode

E)your epidermis

6)Which of the following is NOT a characteristic of the phylum Platyhelminthes?

A) true mesodermal tissue

B) cephalization involving concentration of nerve ganglia

C) gas and water exchange is across the thin body wall

D) free living and parasitic form

E) segmentation

7)A triploblastic animal in which the fluid?filled body cavity is only partially lined (lined on one side) with mesodermal tissue is referred to as:

A)coelomate

B)deuterostome

C)acoelomate

D)protostome

E)pseudocoelomate

8)Which of the following groups are diploblastic animals?

A)corals

B) sponges

C) comb jellies

D) a and b

E) a and c

9)Animals that actively move in a unidirectional fashion through their environment would be expected to exhibit which of the following characteristics?

A) bilateral symmetry

B) sponges

C) comb jellies

D) a and b

E) a and c

goldcamel906

1. CAN BE MORE THAN ONE The arthropods are the most successfulgroup of animals; several key features explain their success. Checkall of the features that one would use to classify members intothis phylum.

growth takes place throughecdysis

a rigid exoskeleton made ofchitin

closed circulatory systems

jointed appendages

a rigid exoskeleton made ofkeratin

segments specialized intofunctional tagmata
2. An entomologist observed a locust sitting on a branch pumpingits abdomen like an accordion. What is the insect doing?

Stretching out its pedipalps

Assisting gas exchange in thetracheal system

Speeding the flow of blood throughits veins and arteries

Clearing its spinnerets

3.Dibenzoylhydrazines are a category of molecules that have beenused as insecticides. They work by blocking ecdysteroid receptors.How does this kill an insect?

The chitinous exoskeleton isdissolved.

The insect can no longer excretenitrogenous wastes.

The insect can no longer coordinateits movements.

The insect cannot molt.

4. The grasshopper equivalent of an ear is found

on the side of its head.

on the abdomen.

Grasshoppers do not have afunctional equivalent to ears.

directly behind the antennae.

5. A snail in your garden and an oyster are quite different inappearance. What would be evidence to justify grouping themtogether?

Both have a mantle capable ofsecreting calcium carbonate.

Both use siphons to obtainoxygen.

Both have sensory antenna.

Both use a radula for feeding.

6.Barnacles are sessile filter feeders but unlike bivalves theyhave internal fertilization. How do they solve this problem?

They are only capable of asexualreproduction.

The filter sperm from the watercolumn.

They are hemaphrodites withespecially long penises.

They get fertilized during free living larval stages.

7. Bivalves lack a radula. How dothey eat?

The gills filter water and extractorganic matter.

The mantle traps and moves sedimentto the stomach for digestion.

Inhalent siphons suck water intothe mouth.

Most bivalves have photosynthetic endosymbionts in the visceralmass.

8.If a marine biology student discovered a dorsoventrallyflattened marine worm, what would be an effective way to determineif the specimen was a flatworm or a ribbon worm?

Examine the morphology of theexcretory system.

Look for a head at the anteriorend.

Determine the number of embryonicmembranes.

Look for an anus.

9.Inside its beak an octopus has a rasping tongue that is usedto tear apart food, which gastropod structure is this analogousto?

Nephridium

Radula

Shell

Mantle

10.Pinworm is spread by contact, and the worms cause severeitching around the anus. Why is it so common?

Insect vectors spread thedisease.

The intense itch produces anintense desire to scratch.