Biology exam - Genetics and molecular biology and ecology questions

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IF I PASS THE EXAM, I HAVE MULTIPLE OTHERS THAT I NEED HELP WITH. DO NOT APPLY IF YOU DO NOT KNOW THE SUBJECT WELL.

Question 1 of 20

5.0 Points

Locally adapted and genetically distinctive populations within a species are referred to as:

A. heterotypes. 

B. metatypes. 

C. genotypes. 

D. ecotypes.  Reset Selection

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Question 2 of 20

5.0 Points

Within a population, if the average is selected for and the two opposing extremes are selected against, this is an example of __________ selection.

A. directional 

B. disruptive 

C. stabilizing 

D. natural  Reset Selection

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Question 3 of 20

5.0 Points

Over time, average phenotypes become less common and the population becomes phenotypically more diverse as a result of __________ selection.

A. bimodal 

B. directional 

C. disruptive 

D. stabilizing  Reset Selection

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Question 4 of 20

5.0 Points

Molecular biology has helped scientists examine the genetics and evolution of different species. Which of the following sequences is correctly ordered?

A. Restriction fragments, restriction enzymes, PCR, electrophoresis 

B. PCR, restriction enzymes, restriction fragments, electrophoresis 

C. Restriction enzymes, PCR, electrophoresis, restriction fragments 

D. PCR, electrophoresis, restriction enzymes, restriction fragments  Reset Selection

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Question 5 of 20

5.0 Points

All of the following conditions are included in the Hardy-Weinberg equilibrium principle EXCEPT:

A. no mutation. 

B. non-random mating.

C. large population size. 

D. no immigration.  Reset Selection

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Question 6 of 20

5.0 Points

__________ is/are defined as a group of potentially breeding organisms within a species in a given space and time.

A. Density 

B. Abundance 

C. Distribution 

D. Populations  Reset Selection

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Question 7 of 20

5.0 Points

Whittaker's research on North American tree distribution examined __________ gradients and concluded that the tree distribution was __________.

A. temperature; random 

B. temperature; clumped 

C. moisture; clumped 

D. moisture; random  Reset Selection

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Question 8 of 20

5.0 Points

In order to determine whether a species is common or rare, ecologists use all of the following criteria EXCEPT:

A. habitat tolerance. 

B. evolutionary existence. 

C. geographical range. 

D. local population size.  Reset Selection

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Question 9 of 20

5.0 Points

The rarest animal is the __________ and the rarest plant is the __________.

A. Northern spotted owl; Pacific Yew 

B. Siberian tiger; Asplenium septrionale 

C. Tasmanian devil; Welwitschia 

D. Mountain gorilla; Prichardia Monroe  Reset Selection

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Question 10 of 20

5.0 Points

Rarity I can be described by the following indicators:

A. restricted range, narrow habitat tolerances, and small local populations. 

B. restricted range, broad habitat tolerances, and large local populations. 

C. extensive range, narrow habitat tolerances, and large local populations. 

D. extensive range, broad habitat tolerances, and small local populations.  Reset Selection

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Question 11 of 20

5.0 Points

Which of the following word pairs are mismatched?

A. Random distribution: aggressive interaction

B. Clumped distribution: attraction to a common source 

C. Regular distribution: antagonistic behaviors

D. Large scale distribution: substantial environmental changes Reset Selection

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Question 12 of 20

5.0 Points

Which of the following is mismatched?

A. Eastern grey kangaroo: temperate and tropical forest 

B. Western grey kangaroo: little seasonal variation in precipitation 

C. Red kangaroo: savanna and desert 

D. Western kangaroo: temperate woodland and shrubland  Reset Selection

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Question 13 of 20

5.0 Points

The Type I survivorship curve indicates:

A. low juvenile mortality and high mortality in older adults. 

B. high juvenile mortality and low mortality in older adults. 

C. low juvenile mortality and low mortality in older adults. 

D. high juvenile mortality and high mortality in older adults.  Reset Selection

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Question 14 of 20

5.0 Points

Humans would best be represented by which of the following survivorships curves?

A. I 

B. II 

C. III 

D. IV  Reset Selection

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Question 15 of 20

5.0 Points

The age distribution of a population can reveal:

A. growth potential. 

B. survivorship. 

C. reproduction. 

D. growth potential, survivorship, and reproduction.  Reset Selection

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Question 16 of 20

5.0 Points

A group of subpopulations living in spatially isolated patches connected by exchange of individuals among patches is called a(n):

A. micropopulation. 

B. megapopulation. 

C. isopopulation. 

D. metapopulation.  Reset Selection

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Question 17 of 20

5.0 Points

Which of the following indicates a population in decline?

A. R0=6.01 

B. R0=0.601 

C. R0=0

D. R0= - 0.601  Reset Selection

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Question 18 of 20

5.0 Points

Out of 1 million eggs laid by a mackerel, more than 999,990 die during the first 70 days of life either as eggs, larvae, or juveniles. The mackerel has a __________ survivorship curve.

A. Type I 

B. Type II 

C. Type III 

D. Type IV  Reset Selection

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Question 19 of 20

5.0 Points

Which of the following equations bests represents the per capita rate of increase?

A. r = T/(ln R0) 

B. r = (ln R0)/T 

C. l = Nt/( Nt+1) 

D. l = (Nt+1)/Nt Reset Selection

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Question 20 of 20

Type II survivorship curve indicates:

A. low juvenile mortality and high mortality in older adults. 

B. high juvenile mortality and low mortality in older adults. 

C. low juvenile mortality and low mortality in older adults. 

D. equal chance of dying at any age.


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(Top Tutor) Daniel C.
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School: Rice University
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