Question 1

Which of the following best describes the law of independent assortment as it applies to meiosis in a diploid organism?

Accepted Answer

Alleles of genes on different chromosomes assort independently of each other during gamete formation.

Question 2

A woman who is heterozygous for an X-linked recessive disorder has children with a man who does not have the disorder. What is the probability that their son will have the disorder?

Accepted Answer

$$0.5$$

Question 3

Which enzyme is responsible for synthesizing short RNA primers during DNA replication?

Accepted Answer

Primase

Question 4

Given the following DNA template strand (5'–AGTCCG–3'), what is the sequence of the complementary mRNA transcript?

Accepted Answer

5'–CGGACU–3'

Question 5

Which of the following best explains why the shared genetic code among all living organisms is considered a homology?

Accepted Answer

It is evidence that all life shares a common ancestor.

Question 6

Which of the following is NOT a condition required for natural selection to occur?

Accepted Answer

All individuals must survive and reproduce equally

Question 7

A population of lizards is separated by a newly formed river, and over time, the two groups diverge into distinct species. This is an example of:

Accepted Answer

Allopatric speciation

Question 8

Which of the following best describes the difference between homology and analogy?

Accepted Answer

Homology refers to traits inherited from a common ancestor; analogy refers to traits that evolved independently due to similar selective pressures.

Question 9

Which of the following is a function of the amniotic egg that contributed to the success of amniotes in terrestrial environments?

Accepted Answer

It provides a watery environment for the embryo, preventing desiccation.

Question 10

Which process in prokaryotes involves the uptake of naked DNA from the environment?

Accepted Answer

Transformation

Question 11

Which of the following best describes the role of the thylakoid membrane in photosynthesis?

Accepted Answer

It contains chlorophyll and is the site of the light-dependent reactions.

Question 12

A plant cell placed in a hypotonic solution becomes turgid. Why is turgidity important for non-woody plants?

Accepted Answer

It provides structural support, helping the plant maintain its shape.

Question 13

Which of the following best describes the difference between xylem and phloem?

Accepted Answer

Xylem transports water and minerals upward; phloem transports sugars in multiple directions.

Question 14

Which of the following is a monophyletic group?

Accepted Answer

A group that includes an ancestor and all of its descendants

Question 15

Which of the following is the correct formula for the logistic growth term that modifies exponential growth?

Accepted Answer

$$\frac{K-N}{K}$$

Question 16

In the context of the Lotka-Volterra predator-prey model, which of the following best describes a numerical response?

Accepted Answer

A change in the number of predators as a result of changes in prey population size

Question 17

Which of the following best explains why fungi are important in ecosystems?

Accepted Answer

They decompose organic matter, recycling nutrients.

Question 18

Which of the following is a key difference between DNA and RNA?

Accepted Answer

DNA is usually double-stranded; RNA is usually single-stranded.

Question 19

Which of the following best describes the difference between the fundamental niche and the realized niche of a species?

Accepted Answer

The fundamental niche is the full range of environmental conditions a species can tolerate; the realized niche is where it is actually found due to biotic interactions.

Question 20

Which of the following best describes the flow of energy and matter in an ecosystem?

Accepted Answer

Energy flows one-way through the ecosystem, while matter cycles.

Comprehensive Study Guide: Core Concepts in College Biology (Bio 104)

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