Plant Processes: Question Preview (ID: 732)

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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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