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Biology Practice Test #5

1 / 40

Which of the following would result in allopatric speciation?

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Tay-Sachs is a disease caused by a recessive allele. Individuals with the genetic disorder usually do not survive more than a few years, and thus are not able to reproduce and pass on the gene. What would explain how this allele and its associated disease is preserved in the population?

3 / 40

In a certain pond, there are long-finned fish and short-finned fish. A horrific summer thunderstorm leads to the death of a disproportionate number of long-finned fish to the point where the relative frequency of the two forms has drastically shifted. This is an example of

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In a population of giraffes, an environmental change occurs that favors individuals that are tallest. As a result, more of the taller individuals are able to obtain nutrients and survive to pass along their genetic information. This is an example of

5 / 40

Which of the following statements about post-transcriptional modification are incorrect?

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This process leads to the net production of two pyruvates, two ATP, and two NADH.

7 / 40

You are told that in a population of guinea pigs, 4 percent are black (recessive) and 96 percent are brown. Which of the following is the frequency of the heterozygous condition?

8 / 40

Which of the following hormones is responsible for the thickening of the endometrium?

9 / 40

The first simple cells evolved approximately 3.5 billion years ago, followed by the more complex eukaryotic cells 2.1 billion years ago. Which of the following statements is correct?

10 / 40

This biome has cold winters and is known for its pine forests.

11 / 40

A deuterostome embryo would exhibit which type of cleavage?

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Which of the following statements is correct?

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Which of the following is a major distinction between veins and arteries?

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As urine moves through the descending loop of Henle, which of the following is true?

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Which of the following theories is based on the notion that mitochondria and chloroplasts evolved from prokaryotic cells?

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Which of the following is an example of a detritivore?

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Imagine an organism whose 2n = 96. Meiosis would leave this organism’s cells with how many chromosomes?

18 / 40

To which of the following labeled trophic levels would a herbivore most likely be assigned?

19 / 40

In a certain population of squirrels that is in Hardy-Weinberg equilibrium, black colour is a recessive phenotype present in 9 percent of the squirrels, and 91 percent are gray. What percentage of the population is homozygous dominant for this trait?

20 / 40

If a couple has had three sons and the woman is pregnant with their fourth child, what is the probability that child 4 will also be male?

21 / 40

Which of the following would result in a non-functional protein?

22 / 40

Which of the following is the specialized structure on the sperm that contains hydrolytic enzymes?

23 / 40

When oxygen becomes unavailable, this process regenerates NAD+, allowing respiration to continue.

24 / 40

Crossover would most likely occur in which situation?

25 / 40

What can you infer about the role of testosterone in reproduction in this species?

26 / 40

Which of the following structures is responsible for the release of calcium ions?

27 / 40

A cell is placed into a hypertonic environment and its cytoplasm shrivels up. This demonstrates the principle of

28 / 40

Which of the following is known to be involved in the photoperiodic flowering response of angiosperms?

29 / 40

A new plant was discovered and determined to have an unusually low number of stomata on the undersides of its leaves. For what environment would this plant most likely be best adapted?

30 / 40

The relatives of a group of pelicans from the same species that separated from each other because of an unsuccessful migration are reunited 150 years later and find that they are unable to produce offspring. This is an example of

31 / 40

Which of the following is not a form of interspecies interaction?

32 / 40

Which of the following statements about photosynthesis is incorrect?

33 / 40

An entire forest is levelled after a forest fire. The process by which organisms will repopulate an area is called:

34 / 40

A population undergoes a shift in which those who are really tall and those who are really short decrease in relative frequency compared to those of medium size, due to a change in the availability of resources. This is an example of

35 / 40

A baby duck runs for cover when a large object is tossed over its head. After this object is repeatedly passed overhead, the duck learns there is no danger and stops running for cover when the same object appears again. This is an example of

36 / 40

DNA polymerases catalyze the production of polynucleotide chains. Which of the following statements holds true:

37 / 40

The distribution of materials in the cytoplasm of an embryo can influence development. Which of the following regions in the zygote would exhibit higher rates of cell division?

38 / 40

Which of the following tends to be highest on the trophic pyramid?

39 / 40

Which of the following cells is most closely associated with phagocytosis?

40 / 40

A reaction that includes energy as one of its reactants is called a(n)

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