Question 1

Which of the following best describes the main function of the root system in vascular plants?

Accepted Answer

To anchor the plant and absorb water and minerals from the soil

Question 2

Which tissue type is primarily responsible for photosynthesis in leaves?

Accepted Answer

Ground tissue

Question 3

A botanist observes a plant with a thickened stem due to the addition of new layers of cells each year. Which process is responsible for this observation?

Accepted Answer

Secondary growth

Question 4

Which of the following cell types is specialized for long-distance transport of water in vascular plants?

Accepted Answer

Tracheids

Question 5

The apical meristem is found at which location in a plant, and what is its primary function?

Accepted Answer

At the tips of roots and shoots; responsible for primary growth

Question 6

Which of the following best explains why leaves are typically thin and flat, using Fick’s law of diffusion?

Accepted Answer

Thin, flat leaves increase the surface area ($$A) $$and decrease the diffusion distance ($$d$$), maximizing the rate of gas exchange as described by Fick’s law: $$J = D \frac{A \Delta C}{d}$$

Question 7

Which of the following is NOT a function of the dermal tissue system in plants?

Accepted Answer

Transport of water and nutrients

Question 8

A tree is wounded, and new tissue forms to heal the wound. Which type of meristem is most directly involved in this process, and what is its role?

Accepted Answer

Lateral (cambium) meristem; produces new vascular tissues for secondary growth

Question 9

Which of the following correctly matches a plant tissue with its main function?

Accepted Answer

Ground tissue – storage and support

Question 10

A plant growing in a windy environment develops thicker stems over time. This is an example of which biological concept?

Accepted Answer

Phenotypic plasticity

Question 11

Which of the following best describes the difference between primary and secondary growth in plants?

Accepted Answer

Primary growth increases the length of stems and roots; secondary growth increases their girth

Question 12

Which structure is responsible for connecting the cytoplasm of adjacent plant cells, allowing for the movement of ions and small molecules?

Accepted Answer

Plasmodesmata

Question 13

A cross-section of a young dicot stem reveals vascular bundles arranged in a ring. Which tissue is found at the center of this ring?

Accepted Answer

Pith

Question 14

Which of the following cell types is most likely to be found in the cortex of a root and is specialized for storage?

Accepted Answer

Parenchyma cells

Question 15

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

Accepted Answer

Transport of sugars and organic nutrients throughout the plant

Question 16

A plant is exposed to drought conditions. Which adaptation in leaf structure would most likely help reduce water loss?

Accepted Answer

Thicker cuticle on the epidermis

Question 17

Which of the following is a correct sequence of tissue organization from the outside to the inside of a typical young root?

Accepted Answer

Epidermis → cortex → endodermis → vascular tissue

Question 18

Which of the following best explains why secondary growth is rare in leaves?

Accepted Answer

Leaves lack a vascular cambium, which is necessary for secondary growth

Question 19

Which of the following is a function of the vascular cambium during secondary growth?

Accepted Answer

Production of new xylem and phloem cells

Question 20

A plant’s shoot system is damaged, but the root system remains intact. Which of the following is most likely to occur?

Accepted Answer

The plant will be unable to perform photosynthesis efficiently

Plant Form and Function: Study Guidance for General Biology

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