Question 1

Which of the following best describes genetic drift and its impact on small populations?

Accepted Answer

Genetic drift is a random change in allele frequencies that has a greater effect in small populations, potentially leading to loss of genetic diversity.

Question 2

A population of beetles is split by a river, and over thousands of years, the two groups evolve into separate species. What type of speciation does this scenario illustrate?

Accepted Answer

Allopatric speciation

Question 3

Which of the following is the correct order of taxonomic ranks from most inclusive to least inclusive?

Accepted Answer

Kingdom, Phylum, Class, Order, Family

Question 4

A plant species has a diploid chromosome number of 24. If it undergoes meiosis to produce gametes, how many chromosomes will each gamete contain?

Accepted Answer

$$12$$

Question 5

Which of the following is a key difference between gymnosperms and angiosperms?

Accepted Answer

Angiosperms produce seeds enclosed in fruits, while gymnosperms produce naked seeds.

Question 6

Which of the following best explains why amphibians are considered a transitional group in vertebrate evolution?

Accepted Answer

They possess both aquatic larval stages and terrestrial adult stages, reflecting adaptation to both environments.

Question 7

A scientist observes that a certain plant species only reproduces when exposed to a specific wavelength of light. Which plant process is most likely being regulated by this environmental cue?

Accepted Answer

Photoperiodism

Question 8

Which of the following is an example of a density-dependent factor affecting population growth?

Accepted Answer

A disease spreads more rapidly as population density increases.

Question 9

In a food web, which of the following best describes the role of decomposers?

Accepted Answer

They recycle nutrients by breaking down dead organic matter.

Question 10

Which of the following equations correctly represents the Hardy-Weinberg equilibrium for a gene with two alleles, $$p$$ and $$q$$?

Accepted Answer

$$p^2 + 2pq$$ + $$q^2 = 1$

Question 11

A population of rabbits is introduced to an island with no natural predators. Over several generations, the population grows rapidly and then levels off. Which population growth model does this scenario best illustrate?

Accepted Answer

Logistic growth

Question 12

Which of the following is a primary function of xylem tissue in vascular plants?

Accepted Answer

Transporting water and minerals from roots to leaves

Question 13

Which of the following best describes the difference between protostomes and deuterostomes during embryonic development?

Accepted Answer

Protostomes develop the mouth before the anus; deuterostomes develop the anus before the mouth.

Question 14

Which of the following is an example of mutualism in a community?

Accepted Answer

Bees pollinating flowers while obtaining nectar

Question 15

Which of the following statements about the carbon cycle is correct?

Accepted Answer

Animals obtain carbon by consuming organic molecules.

Question 16

A scientist is studying a forest ecosystem and measures the amount of energy at each trophic level. If the primary producers capture $$10,000$$ kilocalories of energy, approximately how much energy would be available to secondary consumers, assuming a 10% transfer efficiency at each level?

Accepted Answer

$$100$$ kilocalories

Question 17

Which of the following best explains why invasive species can disrupt ecosystem dynamics?

Accepted Answer

They often lack natural predators in the new environment, allowing them to outcompete native species.

Question 18

Which of the following is a characteristic unique to mammals among vertebrates?

Accepted Answer

Having hair or fur

Question 19

Which of the following best describes the function of stomata in plant leaves?

Accepted Answer

Regulating gas exchange and water loss

Question 20

A population of lizards is found on two separate islands. On one island, the lizards are green, and on the other, they are brown. If a hurricane brings some brown lizards to the green island and they interbreed, which evolutionary mechanism is at work?

Accepted Answer

Gene flow

General Biology Course Outline and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards