Plant Processes Question Preview (ID: 732)

Plant Processes.

Most carbon dioxide enters plants through stomata on the
a) upper surface of leaves
b) root tips
c) lower surface of leaves
d) tips of the stems

____________ causes fruit to ripen
a) ethylene gas
b) auxin
c) chlorophyll
d) gravity

Light energy for the plant to use in making its food is trapped by
a) pigments
b) water
c) chlorophyll
d) auxin

The plant hormone that causes stomata to close and helps plants respond to water loss is
a) abscisic acid
b) auxin
c) cytokinin
d) gibberellin

Plants that require short nights to flower are called ____________ plants
a) day-neutral
b) long-day
c) periodic
d) short-day

Light, _____________, and carbon dioxide all affect the opening and closing of stomata.
a) minerals
b) gravity
c) water
d) insects

The autumn colors of tree leaves are due to _____________ in the leaves.
a) carbon dioxide
b) pigments
c) auxin
d) chlorophyll

The type of growth response having to do with light is called_________
a) phototropism
b) photosynthesis
c) gravitropism
d) photoperiodism

Which of the following describes the function of the chloroplast in plant cells?
a) It traps energy from sunlight.
b) It helps in reproduction.
c) It stores starches.
d) It regulates water content.

What does the outer layer of the leaf do.
a) It allows carbon dioxide, water, and oxygen to exit the cell.
b) It opens and closes the stomata
c) It transports water from the roots to the leaves.
d) It slows the loss of water.

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