Question 1

Which of the following best explains why large multicellular animals require a circulatory system, while many small animals do not?

Accepted Answer

Diffusion is only effective over short distances, so larger animals need a circulatory system to transport nutrients and gases efficiently.

Question 2

A patient is experiencing dehydration. Using the principle of osmotic pressure, what will happen to their cells if they are given a solution that is hypertonic relative to their cytoplasm?

Accepted Answer

Water will move out of the cells, causing them to shrink.

Question 3

Which of the following is a key evolutionary innovation that allowed plants to colonize land?

Accepted Answer

Evolution of vascular tissue for fluid transport.

Question 4

A mammal's body temperature is maintained at $$37^\circ C$$ despite fluctuations in environmental temperature. Which physiological principle is primarily responsible for this?

Accepted Answer

Homeostasis through negative feedback mechanisms

Question 5

Which of the following best describes the role of the soil microbiome in plant nutrition?

Accepted Answer

It enhances nutrient availability by fixing nitrogen and decomposing organic matter.

Question 6

A student is comparing the digestive systems of a carnivorous mammal and a herbivorous mammal. Which of the following differences is most likely to be observed?

Accepted Answer

The herbivore will have a more complex stomach or longer digestive tract to process plant material.

Question 7

Which equation best represents Fick's Law of Diffusion, which is critical for understanding gas exchange in respiratory systems?

Accepted Answer

$$J = -D \frac{\Delta C}{\Delta x}$$

Question 8

Which of the following scenarios best illustrates the concept of bulk flow in biological systems?

Accepted Answer

Blood being pumped through arteries by the heart.

Question 9

Which plant hormone is primarily responsible for mediating the response to light, allowing shoots to grow towards a light source?

Accepted Answer

Auxin

Question 10

A person suffers kidney failure and cannot regulate the concentration of solutes in their blood. Which organ system is primarily responsible for this function in healthy individuals?

Accepted Answer

Excretory system

Question 11

Which of the following best explains why amphibians are often restricted to moist environments for reproduction?

Accepted Answer

Their eggs lack a protective shell and are prone to desiccation.

Question 12

Which of the following is a correct comparison between the nervous and endocrine systems in animals?

Accepted Answer

The endocrine system uses hormones for long-distance signaling, while the nervous system uses electrical impulses for rapid, targeted responses.

Question 13

Which of the following is an example of a positive feedback mechanism in animal physiology?

Accepted Answer

Contractions during childbirth intensifying due to oxytocin release.

Question 14

A plant is exposed to drought conditions. Which hormone is most likely to increase in concentration to help the plant conserve water?

Accepted Answer

Abscisic acid

Question 15

Which of the following best describes the function of mycorrhizal fungi in plant roots?

Accepted Answer

They increase the surface area for water and mineral absorption.

Question 16

Which of the following equations best describes the relationship between cardiac output ($$CO$$), heart rate ($$HR$$), and stroke volume ($$SV) in $$mammals?

Accepted Answer

$$CO = HR 	imes SV$$

Question 17

Which of the following adaptations is most likely to be found in desert plants to minimize water loss?

Accepted Answer

Thick cuticles and reduced leaf surface area.

Question 18

A mutation causes a plant to be unable to produce gibberellins. Which of the following processes would be most directly affected?

Accepted Answer

Seed germination and stem elongation.

Question 19

Which of the following best explains why fish gills are highly efficient at extracting oxygen from water?

Accepted Answer

They use a countercurrent exchange system to maximize the diffusion gradient.

Question 20

Which of the following is a major difference between sexual and asexual reproduction in plants?

Accepted Answer

Sexual reproduction involves the fusion of gametes, leading to offspring with genetic variation.

BIOL 225 – Form and Function of Organisms: Syllabus and Course Structure Overview

Study Guide - Practice Questions

Study Guide - Flashcards