Question 1

Which of the following is a key difference between monocots and eudicots (dicots)?

Accepted Answer

Monocots have parallel leaf venation, while eudicots have branched leaf venation.

Question 2

A botanist discovers a plant with the following characteristics: one cotyledon, scattered vascular bundles, and flower parts in multiples of three. Which group does this plant most likely belong to?

Accepted Answer

Monocots

Question 3

Which of the following best describes the function of stomata in plant leaves?

Accepted Answer

They regulate the exchange of gases, such as $$\mathrm{CO_2$}$$ and $$\mathrm{O_2$}$$, and control water loss through transpiration.

Question 4

Why is a potato considered a stem tuber, while a sweet potato is classified as a storage root?

Accepted Answer

Potatoes have buds (eyes) and nodes, which are stem features, while sweet potatoes lack these and store starch in root tissue.

Question 5

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

Accepted Answer

Vascular tissue

Question 6

A plant is observed to increase in thickness over several years, forming annual rings. Which process and tissue are primarily responsible for this growth?

Accepted Answer

Secondary growth by the vascular cambium

Question 7

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

Accepted Answer

They support sieve-tube elements by providing metabolic functions and are connected via plasmodesmata.

Question 8

Which of the following is NOT a function of the root system in most plants?

Accepted Answer

Carrying out photosynthesis

Question 9

A plant cell expands primarily by which of the following mechanisms?

Accepted Answer

Absorbing water into the vacuole, generating turgor pressure against the cell wall

Question 10

Which of the following best explains why stomata close during drought conditions?

Accepted Answer

To reduce water loss by limiting transpiration

Question 11

Which of the following is a correct sequence of tissue layers from the outside to the inside of a typical woody stem?

Accepted Answer

Cork, cortex, vascular cambium, secondary xylem

Question 12

Which of the following best describes the difference between periclinal and anticlinal cell divisions in the vascular cambium?

Accepted Answer

Periclinal divisions add cells parallel to the surface, increasing thickness; anticlinal divisions add cells perpendicular to the surface, increasing circumference.

Question 13

Which of the following plant modifications is correctly matched with its function?

Accepted Answer

Tendrils – climbing and support

Question 14

A plant completes its life cycle in two years, growing vegetatively the first year and flowering the second. This plant is best classified as a:

Accepted Answer

Biennial

Question 15

Which of the following statements about xylem and phloem is correct?

Accepted Answer

Xylem transports water and minerals upward; phloem transports sugars and organic nutrients throughout the plant.

Question 16

Which of the following best describes the function of the cuticle in plant leaves?

Accepted Answer

It reduces water loss by forming a waxy barrier on the epidermis.

Question 17

A gardener notices that the tips of her tomato plant are growing rapidly, while the sides of the stem are not thickening. Which meristem is primarily responsible for this growth?

Accepted Answer

Apical meristem

Question 18

Which of the following is a real-world example of a plant organ modified for food storage?

Accepted Answer

Carrot taproot

Question 19

Which of the following best explains why sieve-tube elements lack nuclei and most organelles at maturity?

Accepted Answer

To maximize space for the flow of phloem sap

Question 20

A plant's leaves are observed to wilt during the hottest part of the day. Which physiological process is most directly responsible for this phenomenon?

Accepted Answer

Loss of turgor pressure due to excessive transpiration

Plant Form and Function: Study Notes for General Biology

Guida di studio - Domande di pratica

Study guide - Flashcard