Question 1

Which of the following best describes the principle of phylogeny as it relates to the Tree of Life?

Accepted Answer

Phylogeny is the evolutionary history and relationships among individuals or groups of organisms.

Question 2

Which feature is unique to Archaea compared to Bacteria?

Accepted Answer

Ability to survive in extreme environments such as hot springs and salt lakes

Question 3

A scientist discovers a unicellular organism with a nucleus and membrane-bound organelles. To which group does this organism most likely belong?

Accepted Answer

Protists

Question 4

Which of the following is a defining characteristic of angiosperms?

Accepted Answer

Production of flowers and fruit

Question 5

A plant is observed to have parallel leaf veins, scattered vascular bundles, and a fibrous root system. According to plant classification, this plant is most likely a:

Accepted Answer

Monocot

Question 6

Which equation best represents the process of photosynthesis in plants?

Accepted Answer

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

Question 7

Which of the following is a major ecological role of fungi?

Accepted Answer

Decomposition and nutrient cycling

Question 8

Which of the following best explains why insects are considered the most diverse group of animals?

Accepted Answer

They possess a wide variety of adaptations, such as wings and metamorphosis, allowing them to exploit many ecological niches.

Question 9

A patient is experiencing difficulty with gas exchange in the lungs. Which equation best represents the process that is impaired?

Accepted Answer

$$O_2$$ diffuses from alveoli into blood, while $$CO_2$$ diffuses from blood into alveoli

Question 10

Which of the following scenarios best illustrates osmoregulation in freshwater fish?

Accepted Answer

They actively uptake salts through their gills and excrete large volumes of dilute urine.

Question 11

Which hormone is primarily responsible for regulating blood glucose levels, and what is its main effect?

Accepted Answer

Insulin; decreases blood glucose by promoting uptake into cells

Question 12

A person touches a hot stove and quickly withdraws their hand. Which part of the nervous system is primarily responsible for this rapid response?

Accepted Answer

Spinal cord (reflex arc)

Question 13

Which of the following best describes the relationship between animal behavior and natural selection?

Accepted Answer

Behaviors that increase an individual's reproductive success are more likely to be passed on to future generations.

Question 14

Which of the following is an example of a keystone species in an ecosystem?

Accepted Answer

A predator whose removal causes a dramatic shift in community structure

Question 15

Which of the following best describes the impact of global climate change on biodiversity?

Accepted Answer

It can lead to habitat loss, altered species distributions, and increased extinction rates.

Question 16

A population of rabbits is introduced to an island with no natural predators. Over several generations, the population grows rapidly and then stabilizes. Which equation best models this population growth?

Accepted Answer

$$\frac{dN}{dt} = rN \left(1 - \frac{N}{K}\right)$$

Question 17

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

Accepted Answer

Evolution of notochord → development of jaws → appearance of amniotic egg

Question 18

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.

Question 19

Which of the following is a direct consequence of the loss of biodiversity in an ecosystem?

Accepted Answer

Reduced availability of ecosystem services such as pollination and water purification

Question 20

A patient is diagnosed with kidney failure and is unable to excrete urea efficiently. Which process is most directly affected?

Accepted Answer

Excretion

Biology II Course Schedule – Spring 2026: Chapter and Topic Overview

Study Guide - Practice Questions

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