Review Questions

Plant regions of continuous growth are made up of ________.

1. dermal tissue
2. vascular tissue
3. meristematic tissue
4. permanent tissue

Which of the following is the major site of photosynthesis?

1. apical meristem
2. ground tissue
3. xylem cells
4. phloem cells

Stem regions at which leaves are attached are called ________.

1. trichomes
2. lenticels
3. nodes
4. internodes

Which of the following cell types forms most of the inside of a plant?

1. meristem cells
2. collenchyma cells
3. sclerenchyma cells
4. parenchyma cells

Tracheids, vessel elements, sieve-tube cells, and companion cells are components of ________.

1. vascular tissue
2. meristematic tissue
3. ground tissue
4. dermal tissue

The primary growth of a plant is due to the action of the ________.

1. lateral meristem
2. vascular cambium
3. apical meristem
4. cork cambium

Which of the following is an example of secondary growth?

1. increase in length
2. increase in thickness or girth
3. increase in root hairs
4. increase in leaf number

Secondary growth in stems is usually seen in ________.

1. monocots
2. dicots
3. both monocots and dicots
4. neither monocots nor dicots

Roots that enable a plant to grow on another plant are called ________.

1. epiphytic roots
2. prop roots
3. adventitious roots
4. aerial roots

The ________ forces selective uptake of minerals in the root.

1. pericycle
2. epidermis
3. endodermis
4. root cap

Newly-formed root cells begin to form different cell types in the ________.

1. zone of elongation
2. zone of maturation
3. root meristem
4. zone of cell division

The stalk of a leaf is known as the ________.

1. petiole
2. lamina
3. stipule
4. rachis

Leaflets are a characteristic of ________ leaves.

1. alternate
2. whorled
3. compound
4. opposite

Cells of the ________ contain chloroplasts.

1. epidermis
2. vascular tissue
3. periderm
4. mesophyll

Which of the following is most likely to be found in a desert environment?

1. broad leaves to capture sunlight
2. spines instead of leaves
3. needle-like leaves
4. wide, flat leaves that can float

When stomata open, what occurs?

1. Water vapor is lost to the external environment, increasing the rate of transpiration.
2. Water vapor is lost to the external environment, decreasing the rate of transpiration.
3. Water vapor enters the spaces in the mesophyll, increasing the rate of transpiration.
4. Water vapor enters the spaces in the mesophyll, decreasing the rate of transpiration.

Which cells are responsible for the movement of photosynthates through a plant?

1. tracheids, vessel elements
2. tracheids, companion cells
3. vessel elements, companion cells
4. sieve-tube elements, companion cells

The main photoreceptor that triggers phototropism is a ________.

1. phytochrome
2. cryptochrome
3. phototropin
4. carotenoid

Phytochrome is a plant pigment protein that:

1. mediates plant infection
2. promotes plant growth
3. mediates morphological changes in response to red and far-red light
4. inhibits plant growth

A mutant plant has roots that grow in all directions. Which of the following organelles would you expect to be missing in the cell?

1. mitochondria
2. amyloplast
3. chloroplast
4. nucleus

After buying green bananas or unripe avocadoes, they can be kept in a brown bag to ripen. The hormone released by the fruit and trapped in the bag is probably:

1. abscisic acid
2. cytokinin
3. ethylene
4. gibberellic acid

A decrease in the level of which hormone releases seeds from dormancy?

1. abscisic acid
2. cytokinin
3. ethylene
4. gibberellic acid

A seedling germinating under a stone grows at an angle away from the stone and upward. This response to touch is called ________.

1. gravitropism
2. thigmonasty
3. thigmotropism
4. skototropism