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29 Jun 2019

What is evolution and how does it work?

Create a short answer using all of these terms in the response: modern evoluntionary synthesis, natural selection, adaption, fitness, allele frequency, mutation

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Elin Hessel
Elin HesselLv2
1 Jul 2019

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Related questions

Fill in the blank.

When a new mutation occurs that increases the fitness of the carrier relative to other members of the population, natural selection will favor individuals that have a higher fitness. With time the newly mutated variant (allele) will increase in frequency relative to other alleles. As its prevalence increases, neutral and nearly neutral genetic variations linked to the new mutation will also become more prevalent. This phenomenon is called ________.

Which of the following provides evidence for evolution?

All of these answers are correct
Comparing DNA sequences between species
Looking at the geographic distribution of similar species
Comparing similarities in embryonic development between species
Analyzing transitional fossils

Which one of the following statements is true?

Natural selection works on non-heritable traits.
Mutations only give rise to harmful traits.
Natural selection works on variation already present in a population.
Individuals evolve through natural selection.

Which one of the following can create new alleles?

Genetic drift
Natural selection
Gene flow
Mutation

Which of the following is true concerning evolution?

An individual can evolve
Genetic drift is a non-random part of natural selection
An organism's fitness is determined by how long it survives
Natural selection occurs through a change in allele frequency

All living things need carbon. How does carbon enter the living portion of an ecosystem?

Atmospheric carbon dioxide taken in by photosynthesis.
Atmospheric carbon dioxide taken in by soil bacteria.
Elemental carbon taken in by plant roots.
Elemental carbon taken in by cellular respiration.
Elemental carbon taken in by cellular transpiration.

The burning of fossil fuels:

Releases excess carbon dioxide into the atmosphere.
Removes pollutants from the atmosphere.
Was developed by scientists to combat global climate change.
Has no effect on the carbon cycle.
Is good for the environment

__________ conducts water and dissolved minerals from the __________ to the ___________.

Phloem; roots; shoots
Xylem; roots; shoots
Phloem; shoots; roots
Xylem; shoots; roots

What is a disadvantage of growing traditional crops such as corn, soy or sugar cane for making biofuel?

they require lots of land and fresh water
they take carbon dioxide out of the atmosphere
they release oxygen into the atmosphere
they release water through their stomata

______ is the source of the oxygen gas released by a photosystem.

NADPH
H2O
C6H12O6
CO2
Chlorophyll

Through what structure(s) do plants obtain most of their water?

interior cells
stems
leaves
roots
stomata

Which of the following statements is true?

A. Producing more offspring always increases the fitness of an organism.

B. Gene flow between populations may either facilitate natural selection by increasing genetic variation or slow it down by counteracting the effects of selection in that environment.

C. If an allele is fixed in a population, both homozygous and heterozygous genotypes will be present, but the number of homozygotes will be greater.

D. Genetic drift, gene flow, and natural selection can all produce adaptive evolution.

E. A & B

F. A & C

G. A & D

H. A,B & C

I. A,B & D

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