Biology Plant Review

Which type of plant cells play a role in photosynthesis, storage of starches, secretion, and storage of secondary metabolites?

• collenchyma cells

• epidermal cells

• parenchyma cells

• sclerenchyma cells

Tags

NGSS.MS-LS1-6

Why are tracheid cells long, tapered, dead, and hollow?

• to conduct sugars throughout the plant

• to conduct water and minerals throughout the plant

• to provide strength and support for a plant

• to reduce the weight of branches and limbs

Which is a requirement associated with leaves as photosynthetic organs?

• All leaf cells must have direct cell-to-cell contact with the vascular tissues

• Interior leaf temperatures must fluctuate between night and day

• Leaves must receive an extended period of darkness every day

• The mesophyll cells must be continually supplied with water vapor

Tags

NGSS.MS-LS1-6

Which epidermal feature of a leaf has the greatest impact on conserving water?

• bulliform cells

• cuticle

• stomata

• trichomes

How does water move from the roots to the leaves?

• As water transpires from the leaves, a pull is created on the column of water in the xylem

• Protein pumps move water across the cell membranes to restore osmotic pressure in cells

• Water is moved from turgid cells adjacent to water-deficient cells in the phloem tissues

• Water molecules bond to minerals which are then transported upwards

Why is guttation not seen in trees of large woody plants?

• Guttation only occurs in the margins of plants that have broad, fleshy leaves

• Hydathodes in trees or large woody plants are located along seams or folds in the outer bark

• Root pressure is not strong enough to push water up through trees or large woody plants

• Trees or large woody plants are gymnosperms, unlike angiosperms that have evolved guttation

How does a plant regulate the rate of transpiration?

• Root hair activity is switched on or off on demand

• Cellular pumps turn on or off as water is needed

• Stomata are opened or closed based on water availability

• Valves at the ends of xylem cells are opened and closed

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

How does abscisic acid impact the function of guard cells?

• It activates the opening of stomata when soil water is insufficient to keep up with transpiration

• It initiates the openeing of stomata when relative humidity is high and wind sppeds are low

• It stimulates the closing of the stomata when soil water is readily available but emperatures are high

• It triggers the closing of the stomata when soil water is insufficient to keep up with transpiration

Which plant characteristic would likely result in the highest rate of transpiration?

• leaves covered with trichomes

• leaves with a large surface area

• leaves with fewer stomata

• leaves with a thick cuticle layer

Which of the following is a true statement regarding plant stems?

• Stems make new living tissue that results in primary or secondary growth

• Stems of green herbaceous plants are the major photosynthetic organs

• Stems store food manufactured by the plant in specialized cork cells

• Stems transport water and minerals downward to the roots through the xylem