Biology 5236 Practice Exam with 100%
Correct Answers | Verified | Updated 2024
In a germinating seedling, the root grows downward into the soil. Which of the
following correctly explains this phenomenon? - ✔✔The root exhibits positive
gravitropism.
Which of the following best describes the role of transpiration in the water cycle? - ✔✔It moves
water from the soil to the atmosphere.
In which of the following cell types is a mutation most likely to have an impact on the gene
pool of a population? - ✔✔Sperm
Which of the following actions will best help maintain the diversity and abundance of organisms
in a terrestrial ecosystem? - ✔✔Preventing habitat destruction
A population of a certain animal species is found in a protected wildlife preserve. Which of
the following poses the greatest threat to the long-term survival of the population? - ✔✔
,Which of the following describes the primary function of bone marrow in humans? - ✔✔
Which of the following is the best example of habitat fragmentation? - ✔✔
Ether can be used to anesthetize fruit flies. The flies are typically anesthetized in an etherizer, a
small chamber that contains an absorbent material onto which a few drops of ether are placed
before the flies are introduced. Ether is volatile and highly flammable. In which of the following
locations should the ether be added to the etherizer? - ✔✔
A diploid organism has the genotype uppercase A, lowercase a, uppercase B, lowercase b,
uppercase C, lowercase cAaBbCc in regard to three unlinked genetic loci. A normal
gamete produced by the organism could have which of the following genotypes? - ✔✔
Which of the following statements best explains how insulin helps regulate blood glucose
levels in a healthy individual? - ✔✔It stimulates the uptake of glucose by cells of the body.
The human population on Earth grew from an estimated one billion individuals to over seven
billion individuals over two hundred years. Based on the information presented, which of
the following was most likely true about the human population? - ✔✔
A teacher is preparing a lesson to help students distinguish between scientific theories, laws,
and hypotheses. The teacher will provide several examples of each. Which TWO of the
following statements best illustrate scientific theories? - ✔✔
, Which of the following statements correctly describes a step in the processing of a newly
synthesized messenger RNA molecule in a eukaryotic cell? - ✔✔A poly-A tail is added to
one end of the molecule.
A certain protein hormone stimulates changes in gene expression in the liver cells of a
mouse but not in the kidney cells of the same mouse. Which of the following types of
molecules are most likely present in the liver cells but not in the kidney cells? - ✔✔
Which of the following terms describes the collective interaction of turtles, insects, frogs,
birds, and water plants that live in and around the same pond? - ✔✔
Which of the following best explains why the roots of a garlic bulb must be completely
removed before the bulb is imported into the United States? - ✔✔
Which of the following theories is supported by the observations that mitochondria
are enclosed by a double membrane and have their own genomes? - ✔✔
In fungi, the digestion of relatively large food molecules typically begins in which of the
following locations? - ✔✔In the extracellular environment
Students are creating a model of a predator-prey relationship. Which of the following should
the students use to show how the population size of both a predator and its prey change
over time? - ✔✔
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