Question 1

Which of the following best describes why plant cells are considered to 'live in boxes' and how this benefits them?

Accepted Answer

Plant cells are enclosed by a rigid cell wall made of cellulose, which provides structural support and protection, allowing plants to grow upright and withstand environmental stresses.

Question 2

Which of the following is NOT a key difference between plants and animals?

Accepted Answer

Animals possess rigid cell walls made of cellulose for structural support.

Question 3

Which plant organ is primarily responsible for absorbing water and minerals from the soil?

Accepted Answer

Root

Question 4

Which tissue system in plants is responsible for long-distance transport of water, minerals, and sugars?

Accepted Answer

Vascular tissue

Question 5

A botanist discovers a plant with parallel leaf veins and scattered vascular bundles in the stem. Which group does this plant most likely belong to?

Accepted Answer

Monocots

Question 6

Which of the following is a function of root hairs?

Accepted Answer

Increasing the surface area for water and mineral absorption

Question 7

Which of the following best explains why xylem cells have secondary cell walls hardened with lignin?

Accepted Answer

To strengthen the plant for water transport under tension and provide structural support

Question 8

Which of the following is a correct pairing of a plant cell type and its primary function?

Accepted Answer

Sclerenchyma – rigid support and protection, often dead at maturity

Question 9

Which of the following is a real-world example of a modified stem used for storage?

Accepted Answer

Potato

Question 10

Which of the following best describes the function of sieve-tube elements in phloem?

Accepted Answer

Transport of organic compounds from sugar-rich 'source' to sugar-poor 'sink'

Question 11

A plant biologist is studying a tissue composed of living cells with unevenly thickened primary cell walls that provide flexible support. Which tissue is being studied?

Accepted Answer

Collenchyma

Question 12

Which of the following is NOT a function of the plant stem?

Accepted Answer

Absorption of water and minerals from soil

Question 13

Which of the following best explains why sieve-tube elements in phloem lack a nucleus and most organelles?

Accepted Answer

To maximize space for the flow of organic compounds

Question 14

Which of the following is a commercial use for sclereid cells?

Accepted Answer

Abrasives and exfoliators in cosmetics

Question 15

Which of the following statements about plant tissue systems is correct?

Accepted Answer

Vascular tissue includes xylem and phloem, responsible for transport and support.

Question 16

Which of the following best describes the evolutionary significance of vascular tissue in plants?

Accepted Answer

It enabled plants to grow taller and transport water and nutrients efficiently, leading to greater diversification.

Question 17

Which of the following is a correct statement about the difference between cortex and pith in plant organs?

Accepted Answer

Cortex is the ground tissue external to the vascular tissue, while pith is the ground tissue internal to the vascular tissue.

Question 18

Which of the following plant organs is most likely to be modified for defense, storage, climbing, or reproduction?

Accepted Answer

Leaf

Question 19

Which of the following best describes the function of the endodermis in plant roots?

Accepted Answer

It acts as a living barrier to control the selective transport of substances into the vascular cylinder.

Question 20

Which of the following is a correct statement about the origin of lateral roots in plants?

Accepted Answer

Lateral roots originate from the pericycle, a layer of cells just inside the endodermis.

Topic 6 Plant Physiology: Plant Organs and Plant Cells – Structure, Function, and Diversity

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