21) Which plant tissue contains cells called tracheids?

A) meristematic tissue

B) phloem

C) xylem

D) ground substance

22) You find a leaf that has large stomata and a thick, waxy covering. What is clear about the original plant?

A) The plant minimizes sunlight uptake.

B) The plant maximizes nutrient uptake.

C) The plant minimizes nutrient uptake.

D) The plant minimizes water loss.

23) Which statement best describes primary growth in angiosperms?

A) Growth occurs at the tips of shoots and roots.

B) Growth occurs evenly throughout the plant.

C) First-year growth occurs at the tips of shoots and roots, and then growth occurs evenly throughout the plant as it ages.

D) First-year growth occurs evenly throughout the plant, and then growth only occurs at the tips and shoots as it ages.

24) Growth areas of an angiosperm are called:

A) ground tissue.

B) root caps.

C) cuticles.

D) apical meristems.

25) Lateral buds tend to stay dormant when:

A) conditions are favorable for leaf growth.

B) damaged apical meristems produce hormones that suppress their growth.

C) healthy apical meristems produce hormones that suppress their growth.

D) root growth is rapid.

26) Because a plant can grow indefinitely at the tips of the roots and shoots, we say that a plant’s growth is:

A) annualized.

B) indeterminate.

C) determinate.

D) limitless.

27) Which of the following best describes the nature of the cells of mature, functioning xylem?

A) living, thick-walled tubes

B) dead, thick-walled tubes

C) living cells that have lost their nucleus

D) dead cells that retain some organelles and some maintenance functions

28) Which of the following best describes the nature of the sieve element cells of mature, functioning phloem?

A) living, thick-walled tubes

B) dead, thick-walled tubes

C) living cells that have lost their nucleus

D) dead cells that retain some organelles and some maintenance functions

29) The force that moves water through xylem is provided by:

A) gravity.

B) transpiration.

C) osmosis.

D) active transport.

30) The force that moves material through phloem is provided by:

A) gravity.

B) transpiration.

C) osmosis.

D) active transport.