Question 1

Which of the following best explains why root hairs are critical for plant water absorption?

Accepted Answer

Root hairs increase the surface area available for water and nutrient uptake.

Question 2

A plant growing in dry, sandy soil is likely to develop which type of root system, and why?

Accepted Answer

A deep taproot system to access water deep underground.

Question 3

Which equation correctly represents water potential ($$\Psi) in $$plant cells?

Accepted Answer

$$\Psi = \Psi_s + \Psi_p$$

Question 4

What is the primary function of the apical bud in a plant shoot system?

Accepted Answer

To promote vertical growth and elongation of the stem.

Question 5

Which tissue is responsible for transporting water and dissolved minerals from roots to shoots?

Accepted Answer

Xylem

Question 6

A cactus stem is thick and fleshy. What is the main adaptive advantage of this modification?

Accepted Answer

It stores water to survive in arid environments.

Question 7

Which of the following best describes the pressure-flow hypothesis for phloem transport?

Accepted Answer

Sugars move from sources to sinks due to pressure differences created by active loading and unloading.

Question 8

Which cell type is dead at maturity and provides structural support in plant stems?

Accepted Answer

Sclerenchyma

Question 9

If a plant’s leaf cells lose turgor pressure, what is the most likely visible effect?

Accepted Answer

The leaves will wilt.

Question 10

Which of the following is a real-world example of a plant adaptation to reduce water loss?

Accepted Answer

Needle-like leaves in pine trees.

Question 11

Which process is primarily responsible for the upward movement of water in xylem?

Accepted Answer

Transpiration

Question 12

A plant cell with a solute potential ($$\Psi_s) of$$ $$-0.7$$ MPa and a pressure potential ($$\Psi_p) of$$ $$0.5$$ MPa has a total water potential ($$\Psi) of$$:

Accepted Answer

$$\Psi = -0.2$$ MPa

Question 13

Which of the following best describes the function of the root cap?

Accepted Answer

It protects the root apical meristem and helps the root penetrate soil.

Question 14

Which pathway allows water to move through the root via cell walls and intercellular spaces, bypassing the cytoplasm?

Accepted Answer

Apoplastic pathway

Question 15

What is the main difference between parenchyma and collenchyma cells?

Accepted Answer

Parenchyma cells are thin-walled and versatile, while collenchyma cells have thickened walls for flexible support.

Question 16

Which of the following is a function of trichomes on plant leaves?

Accepted Answer

Reducing water loss and protecting against herbivores.

Question 17

Which structure is responsible for secondary growth (increase in width) in woody plants?

Accepted Answer

Vascular cambium

Question 18

A plant’s phloem is damaged by an insect. What is the most likely consequence?

Accepted Answer

Transport of sugars from leaves to roots will be impaired.

Question 19

Which of the following best explains why tuberous root structures, such as those in potatoes, are advantageous for plants?

Accepted Answer

They store carbohydrates and water for periods of dormancy or stress.

Question 20

Which of the following scenarios best illustrates phenotypic plasticity in plant root systems?

Accepted Answer

A plant growing deeper roots in response to drought conditions.

Plant Form and Physiology: Fundamentals, Diversity, and Root Systems

Guida di studio - Domande di pratica

Study guide - Flashcard