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Biology Practice Test #5

1 / 40

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

2 / 40

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

3 / 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

4 / 40

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

5 / 40

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

6 / 40

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

7 / 40

Which of the following is an example of a detritivore?

8 / 40

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

9 / 40

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

10 / 40

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

11 / 40

Which of the following would result in allopatric speciation?

12 / 40

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

13 / 40

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

14 / 40

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

15 / 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

16 / 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?

17 / 40

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

18 / 40

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

19 / 40

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

20 / 40

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

21 / 40

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

22 / 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?

23 / 40

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

24 / 40

Which of the following statements about photosynthesis is incorrect?

25 / 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

26 / 40

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?

27 / 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?

28 / 40

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

29 / 40

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

30 / 40

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

31 / 40

Crossover would most likely occur in which situation?

32 / 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

33 / 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?

34 / 40

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

35 / 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?

36 / 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?

37 / 40

Which of the following statements is correct?

38 / 40

A deuterostome embryo would exhibit which type of cleavage?

39 / 40

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

40 / 40

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

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