Question 1

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

Accepted Answer

A higher $$\frac{SA}{V}$$ 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 ($$\Psi) is $$most affected, and what is the likely consequence for water uptake?

Accepted Answer

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

Question 3

Which of the following is a key difference between primary and secondary growth in plants?

Accepted Answer

Primary growth increases length via apical meristems, while secondary growth increases girth via lateral meristems.

Question 4

Which tissue system in plants is primarily responsible for controlling water loss and gas exchange, and what structures are involved?

Accepted Answer

Dermal tissue; stomata and trichomes

Question 5

A plant's xylem is damaged by a pathogen. Which process is most directly affected, and what is the likely outcome?

Accepted Answer

Bulk flow of water from roots to leaves is impaired, leading to wilting.

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 within an individual's lifetime.

Question 7

Which of the following is NOT a method by which animals increase surface area for exchange?

Accepted Answer

Increasing cell size

Question 8

A patient is unable to maintain a stable internal body temperature despite environmental changes. Which homeostatic mechanism is most likely impaired?

Accepted Answer

Negative feedback

Question 9

Which of the following best explains why companion cells are essential for phloem function in plants?

Accepted Answer

They provide metabolic support and help load sugars into sieve tube elements via active transport.

Question 10

Which of the following scenarios best illustrates secondary active transport in plant cells?

Accepted Answer

A proton gradient established by ATPase drives sucrose uptake into the vacuole via an antiporter.

Question 11

Which of the following is a correct sequence for the movement of water from soil into the xylem of a root?

Accepted Answer

Epidermis → Cortex → Endodermis → Pericycle → Xylem

Question 12

Which of the following best describes the role of the statocyst in animal sensory systems?

Accepted Answer

It detects changes in orientation and helps maintain equilibrium using otoliths.

Question 13

Which property of water is most important for the cohesion-tension theory of transpiration in plants?

Accepted Answer

Cohesion between water molecules due to hydrogen bonding

Question 14

Which of the following is a trade-off associated with increased surface area in animal tissues?

Accepted Answer

Greater surface area increases exchange but may increase water loss.

Question 15

Which of the following best explains why leaves change color in autumn?

Accepted Answer

Chlorophyll breaks down, revealing carotenoids and anthocyanins.

Question 16

Which of the following is a correct statement about the difference between simple and compound leaves?

Accepted Answer

Simple leaves have a single undivided blade; compound leaves have blades divided into leaflets.

Question 17

Which of the following best describes the function of amyloplasts in plant root cells?

Accepted Answer

They detect gravity by settling in response to its pull, aiding in root growth direction.

Question 18

Which of the following is a correct pairing of animal tissue type and its primary function?

Accepted Answer

Epithelial tissue: forms protective barriers and regulates exchange

Question 19

Which of the following best explains why negative feedback is essential for homeostasis?

Accepted Answer

It counteracts deviations from a set point, maintaining internal stability.

Question 20

Which of the following is a correct statement about the interplay between xylem and phloem in plants?

Accepted Answer

Xylem transports water and minerals upward; phloem transports sugars bidirectionally between sources and sinks.

Plant and Animal Form and Function: Structure, Transport, and Physiology

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