Question 1

Which of the following best explains why the surface area to volume ratio ($$SA:V) is $$critical for both plant roots and animal cells?

Accepted Answer

A higher $$SA:V$$ ratio allows for more efficient exchange of materials with the environment.

Question 2

A plant is growing in soil with high salt concentration. Which component of water potential is most affected, and what is the likely effect on water uptake by roots?

Accepted Answer

Solute potential ($$\Psi_s) $$decreases, making it harder for roots to absorb water.

Question 3

Which of the following is a correct sequence of tissues encountered by water as it moves from soil into the xylem of a root?

Accepted Answer

Epidermis → Cortex → Endodermis → Pericycle → Xylem

Question 4

Which property of water is most directly responsible for the cohesion-tension mechanism of water transport in plants?

Accepted Answer

Hydrogen bonding between water molecules

Question 5

A plant's leaves are covered with trichomes. What is the most likely function of these structures?

Accepted Answer

Reducing water loss by reflecting sunlight and trapping moisture

Question 6

Which of the following best describes the difference between adaptation and acclimation in animals?

Accepted Answer

Adaptation is a heritable trait evolved over generations; acclimation is a reversible change in an individual.

Question 7

Which tissue type is responsible for transmitting electrical signals in animals, and what is a key feature of this tissue?

Accepted Answer

Nervous tissue; contains neurons with long extensions for signal transmission

Question 8

Which of the following is an example of negative feedback in homeostasis?

Accepted Answer

Sweating to cool the body when temperature rises

Question 9

Which of the following best explains why folding and branching are common anatomical features in organs such as the intestines and lungs?

Accepted Answer

They increase surface area for exchange of materials.

Question 10

Which of the following best describes the role of companion cells in phloem transport?

Accepted Answer

They load and unload sugars into sieve tube elements using active transport.

Question 11

A plant is observed to have secondary growth, forming rings each year. Which tissue is primarily responsible for this growth?

Accepted Answer

Vascular cambium

Question 12

Which of the following scenarios best illustrates a trade-off in animal physiology?

Accepted Answer

A cheetah can run very fast but only for short distances due to rapid energy depletion.

Question 13

Which process is responsible for the bulk flow of water through xylem, and what drives this process?

Accepted Answer

Transpiration; driven by the evaporation of water from leaves

Question 14

Which of the following best describes the movement of sugars from source to sink in plants?

Accepted Answer

Sugars are actively loaded into phloem at the source and unloaded at the sink.

Question 15

Which of the following is a correct example of secondary active transport in plant cells?

Accepted Answer

A proton gradient established by ATPase is used to drive sucrose uptake via a symporter.

Question 16

Which of the following best explains why endotherms generally have higher metabolic rates than ectotherms?

Accepted Answer

Endotherms use metabolic heat to maintain a constant internal temperature.

Question 17

Which of the following is a function of the cork cambium in plants?

Accepted Answer

Producing protective outer layers such as bark

Question 18

A plant's leaves are observed to change color in autumn. Which process is most directly responsible for this phenomenon?

Accepted Answer

Breakdown of chlorophyll, revealing carotenoids and anthocyanins

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

Which of the following best explains why increasing the surface area of an organ (such as by folding or branching) is advantageous for multicellular organisms?

Accepted Answer

It enhances the rate of exchange of materials (e.g., gases, nutrients) with the environment.

Plant Form and Function, Water and Sugar Transport, and Animal Form and Function

Study Guide - Practice Questions

Study Guide - Flashcards