Question 1

Which of the following best describes the function of xylem in vascular plants?

Accepted Answer

Transports water and minerals from roots to shoots

Question 2

A botanist observes a plant with parallel leaf venation, fibrous roots, and floral organs in multiples of three. Which type of plant is this most likely to be?

Accepted Answer

Monocot

Question 3

Which of the following equations correctly represents the process of photosynthesis in plants?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 4

Which specialized plant cell is responsible for opening and closing stomata to regulate gas exchange?

Accepted Answer

Guard cell

Question 5

A plant is exposed to drought conditions. Which adaptation would most likely help it conserve water?

Accepted Answer

Thick cuticle and sunken stomata

Question 6

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

Accepted Answer

Primary growth increases length; secondary growth increases thickness.

Question 7

Which tissue is responsible for the transport of organic nutrients, such as sucrose, in plants?

Accepted Answer

Phloem

Question 8

Which of the following is a correct sequence of events in the double fertilization process of angiosperms?

Accepted Answer

One sperm fertilizes the egg, another sperm fertilizes the central cell to form endosperm

Question 9

Which of the following best explains why root hairs are important for plant survival?

Accepted Answer

They increase the surface area for water and mineral absorption

Question 10

A plant is placed in a hypertonic solution. What will most likely happen to its cells?

Accepted Answer

They will undergo plasmolysis

Question 11

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

Accepted Answer

Transport of sugars

Question 12

Which hormone is primarily responsible for cell elongation in plant stems?

Accepted Answer

Auxin

Question 13

Which of the following best describes the cohesion-tension theory of water transport in plants?

Accepted Answer

Water evaporates from leaves, creating a negative pressure that pulls water upward

Question 14

Which of the following is a correct description of a meristem?

Accepted Answer

A region of undifferentiated cells capable of division

Question 15

Which of the following best explains why transpiration is important for plants?

Accepted Answer

It helps transport minerals from roots to leaves

Question 16

A plant is exposed to light from only one direction. Which hormone is responsible for the bending of the stem toward the light?

Accepted Answer

Auxin

Question 17

Which of the following is a function of the endosperm in angiosperm seeds?

Accepted Answer

Provides nutrients to the developing embryo

Question 18

Which of the following best describes the Casparian strip in plant roots?

Accepted Answer

A waxy barrier that forces water and solutes to pass through the plasma membrane of endodermal cells

Question 19

Which of the following is the correct formula for water potential ($$\Psi) in $$plant cells?

Accepted Answer

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

Question 20

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

Accepted Answer

They help load and unload sugars into sieve-tube elements

Plant Structure, Angiosperm Reproduction, and Resource Transport: Study Guide

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