Question 1

Which of the following best describes the concept of 'descent with modification' as it relates to evolution?

Accepted Answer

The passing of traits from parent to offspring, with changes accumulating over generations, leading to diversity of life.

Question 2

A biologist is constructing a phylogenetic tree to show evolutionary relationships among several species. Which type of data would be LEAST useful for this purpose?

Accepted Answer

Geographic proximity alone, without genetic or morphological data

Question 3

Which of the following scenarios best illustrates the process of allopatric speciation?

Accepted Answer

A group of birds is separated by the formation of a new river, and over time, the two groups evolve into distinct species.

Question 4

Which of the following is a key difference between prokaryotes and eukaryotes?

Accepted Answer

Eukaryotes have a nucleus containing their genetic material, while prokaryotes do not.

Question 5

A botanist is studying the colonization of land by plants. Which adaptation was most critical for the first plants to survive on land?

Accepted Answer

Development of a waxy cuticle to prevent water loss

Question 6

Which equation best represents the Hardy-Weinberg equilibrium for a gene with two alleles, A and a?

Accepted Answer

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

Question 7

A population of rabbits is exposed to a new predator. Over several generations, the average running speed of the rabbits increases. Which evolutionary mechanism is most likely responsible for this change?

Accepted Answer

Natural selection

Question 8

Which of the following best explains why vascular plants can grow taller than non-vascular plants?

Accepted Answer

Vascular plants have specialized tissues (xylem and phloem) that transport water and nutrients efficiently.

Question 9

A scientist observes that a certain plant species closes its stomata during the hottest part of the day. What is the most likely reason for this behavior?

Accepted Answer

To prevent excessive water loss through transpiration

Question 10

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

Accepted Answer

Origin of eukaryotes → Origin of multicellularity → Origin of vertebrates

Question 11

Which of the following best describes the function of the xylem in vascular plants?

Accepted Answer

Transport of water and minerals from roots to shoots

Question 12

A patient is diagnosed with an autoimmune disease. Which component of the immune system is most likely malfunctioning?

Accepted Answer

The ability to distinguish self from non-self antigens

Question 13

Which of the following best explains why oxygen is necessary for efficient ATP production in animal cells?

Accepted Answer

Oxygen acts as the final electron acceptor in the electron transport chain.

Question 14

A population of deer is introduced to a new island. After several generations, the population's genetic diversity decreases due to random events. Which evolutionary process is this an example of?

Accepted Answer

Genetic drift

Question 15

Which of the following is a direct consequence of global climate change on biological systems?

Accepted Answer

Shifts in species distributions and altered timing of biological events

Question 16

Which of the following equations correctly represents the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 17

Which of the following best describes the role of keystone species in an ecosystem?

Accepted Answer

Their removal causes significant changes in ecosystem structure and function.

Question 18

A student is studying the carbon cycle. Which process removes carbon dioxide from the atmosphere?

Accepted Answer

Photosynthesis

Question 19

Which of the following is a primary function of the nervous system in animals?

Accepted Answer

Coordinating responses to internal and external stimuli

Question 20

A population of plants is exposed to a prolonged drought. Over time, only individuals with deep root systems survive and reproduce. Which type of selection is most likely occurring?

Accepted Answer

Directional selection

BIOL 1102 Biology II Syllabus and Topic Overview

Guida di studio - Domande di pratica

Study guide - Flashcard