Question 1

Which of the following best describes the endosymbiotic theory as it relates to the origin of eukaryotic cells?

Accepted Answer

Eukaryotic cells originated when a large prokaryote engulfed smaller prokaryotes, which then became organelles such as mitochondria and chloroplasts.

Question 2

During photosynthesis, which accessory pigment assists chlorophyll in capturing light energy, and what is its primary function?

Accepted Answer

Carotenoids; they absorb light in the blue and green regions and protect chlorophyll from photo-damage.

Question 3

A scientist is studying a newly discovered single-celled organism with a nucleus and membrane-bound organelles. Based on the lecture topics, to which group does this organism most likely belong?

Accepted Answer

Eukaryotes

Question 4

Which of the following best explains why respiration is essential for eukaryotic cells?

Accepted Answer

It allows cells to convert glucose into ATP, providing energy for cellular processes.

Question 5

Which of the following is a correct sequence of events in the evolution of plant diversity?

Accepted Answer

Development of vascular tissue → evolution of seeds → evolution of flowers

Question 6

A population of birds is observed to have a wide variety of beak shapes. According to the concept of natural selection, what is the most likely explanation for this diversity?

Accepted Answer

Different beak shapes provide advantages for accessing different food sources, leading to increased survival and reproduction of individuals with advantageous traits.

Question 7

Which of the following best describes the process of speciation?

Accepted Answer

The formation of new and distinct species through the splitting of a single lineage into two or more genetically independent lineages.

Question 8

A biologist is comparing the life histories of two species. Species A produces many offspring with little parental care, while Species B produces few offspring with extensive parental care. Which ecological concept does this scenario best illustrate?

Accepted Answer

r/K selection theory

Question 9

Which of the following equations represents the Hardy-Weinberg equilibrium for a gene with two alleles, A and a?

Accepted Answer

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

Question 10

A population of deer is introduced to a new island. Over several generations, the population grows rapidly, then levels off as resources become limited. Which population growth model best describes this scenario?

Accepted Answer

Logistic growth model

Question 11

Which of the following is a real-world example of the competitive exclusion principle?

Accepted Answer

Two species of barnacles competing for the same space on a rocky shore, with one species eventually outcompeting and excluding the other.

Question 12

Which of the following best explains the difference between primary and secondary succession in ecology?

Accepted Answer

Primary succession occurs on newly formed or exposed surfaces without soil, while secondary succession occurs in areas where a disturbance has destroyed a community but left the soil intact.

Question 13

Which of the following statements about tardigrades is correct?

Accepted Answer

Tardigrades are microscopic animals known for their ability to survive extreme environmental conditions, including desiccation and radiation.

Question 14

Which of the following best describes the role of accessory pigments in photosynthesis?

Accepted Answer

They broaden the spectrum of light that can be used for photosynthesis by absorbing wavelengths not absorbed by chlorophyll.

Question 15

A researcher observes that a certain animal species has both a notochord and pharyngeal slits during its embryonic development. To which phylum does this animal most likely belong?

Accepted Answer

Chordata

Question 16

Which of the following is the best example of coevolution?

Accepted Answer

A flowering plant evolving nectar tubes that match the tongue length of its pollinator moth.

Question 17

Which of the following best describes the difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus and membrane-bound organelles, while prokaryotic cells do not.

Question 18

Which of the following is a correct statement about the process of meiosis in sexual reproduction?

Accepted Answer

Meiosis reduces the chromosome number by half, producing haploid gametes.

Question 19

Which of the following best explains why biodiversity is important for ecosystem stability?

Accepted Answer

Greater biodiversity increases the resilience of ecosystems to disturbances and environmental changes.

Question 20

A scientist is studying the process by which a population of insects becomes resistant to a pesticide over several generations. Which evolutionary mechanism is primarily responsible for this change?

Accepted Answer

Natural selection

General Biology I: Tentative Lecture Outline and Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards