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The only source of new alleles in species is _________________....

The only source of new alleles in species is _________________.

Question 1 options:

mitosis

mutation

 speciation

genetic drift

sexual reproduction

SaveQuestion 2 (5 points)

 


_____________ is the primary pressure on species to change over time.

Question 2 options:

Natural selection

Mutation

Adaptation

SaveQuestion 3 (5 points)

 



The wing of a bird and the arm of a human are examples of ________ structures.

Question 3 options:

vestigial

molecular

homologous

analogous


Question 4 (5 points)

 


Allopatric speciation is to geography as _________________ speciation is to genetic change.

Question 4 options:

parapatric

sympatric

peripatric

de novo

SaveQuestion 5 (5 points)

 


Which of the following are homologous structures?

Question 5 options:

The forelimb of a dog and the hindlimb of a cat

The mouth of a mosquito and the beak of a hummingbird

Wings of a butterfly and wings of a sparrow

The forelimb of a dog and the forelimb of a cat

SaveQuestion 6 (5 points)

 


What does natural selection result in?

Question 6 options:

Increased genetic variation

A population that is better adapted to a future environment

A population that is adapted to its current environment

An increase in the size of a population


Question 7 (5 points)

 


Homology is evidence of ______, while analogous structures are evidence of ______.

Question 7 options:

convergent evolution; common ancestry

punctuated evolution; divergent evolution

common ancestry; convergent evolution

paedomorphosis; stabilizing selection

SaveQuestion 8 (5 points)

 



Phylogeny is a description of ____________.

Question 8 options:

mutations

DNA

evolutionary history

organisms on Earth

SaveQuestion 9 (5 points)

 



Old world monkeys have prominent tails; apes and humans do not. See the diagram. At what labeled point did this evolutionary event (loss of the tail) occur?

Question 9 options:

Point 1

Point 2

Point 3


Question 10 (5 points)

 


Complete the following analogy: Microevolution is to population as macroevolution is to ______________.

Question 10 options:

genes

reproduction

individuals

speciation

SaveQuestion 11 (5 points)

 


A storm uproots 60% of the trees in a population. This is an example of __________________.

Question 11 options:

genetic drift

gene flow

mutation

macroevolution

SaveQuestion 12 (5 points)

 


What type of reproductive isolating mechanism occurs when female fireflies only mate with males who emit light in a particular pattern?

Question 12 options:

Habitat isolation

Temporal isolation

Mechanical isolation

Behavioral isolation


Question 13 (5 points)

 


After a disastrous blizzard, there was a significant increase in the allele frequency of blue eye color in Husky dogs. The frequency of alleles for brown-eyed dogs was 7.5% and the allele frequency for hazel-eyed dogs was 22.5% of all alleles for the population. What is the allele frequency percentage for the blue-eyed Husky dogs in this population?

Question 13 options:

7.5

22.5

30

70

SaveQuestion 14 (5 points)

 


A group of 20 people decide to leave Brazil and settle on a deserted island in the Caribbean. There they form a new population isolated from contact with other human beings. This is an example of ______________.

Question 14 options:

speciation

gene flow

genetic drift

mutation

SaveQuestion 15 (5 points)

 


Microevolution is to population as macroevolution is to __________.

Question 15 options:

individuals

communities

biodiversity

species


Question 16 (5 points)

 



The graph shows of the bacteria H. pylori evolved a resistance to antibiotics over a period of 20 years. Resistance evolved most for the antibiotic __________________.

Question 16 options:

Metronidazole

Amoxicillin

Clarithromycin

Tetracycline

SaveQuestion 17 (5 points)

 


What are the similarity of fish, frog, bird, and human embryos evidence of?

Question 17 options:

Analogy

Common ancestry

Genetic Drift

Genetic mutation

SaveQuestion 18 (5 points)

 


Mendel discovered that whether his peas were yellow or green is determined by a single gene in which yellow (Y) is dominant over green (y). Assuming low selective pressure, what does the Hardy-Weinberg Equilibrium frequency term 2pq represent in the peas?

Question 18 options:

heterozygous, Yy

homozygous recessive, yy

homozygous dominant, YY


Question 19 (5 points)

 



After a drought in 1977, the number of birds on Daphne Major Island decreased by ___________ times compared with the original population size.

Question 19 options:

8

2

12

20

SaveQuestion 20 (5 points)

 



This graphic as well as the p and q values shown in each part of the image exemplify one of four factors that can shift the allele frequency in a small population. Which factor from the list below best explains the changes over three generations in this rabbit population?

Question 20 options:

Natural selection

Mutation

Genetic drift

Migration (Gene flow)

Answer & Explanation
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