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ICSE Class 10 Plant Physiology — practice questions — page 6

Explore 212 free Plant Physiology questions in ICSE Class 10 Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Plant Physiology questions and exercises with answers

Showing questions 151–180 of 212.

Why can water shortage limit a plant’s photosynthesis?Read the answer and worked solution →Which stage is photochemical and temperature-independent?Read the answer and worked solution →Which photosynthetic stage is temperature-dependent in this comparison?Read the answer and worked solution →Which statement best explains why light wavelength matters?Read the answer and worked solution →Plant hormones are produced at what concentration?Read the answer and worked solution →What broad processes do plant hormones help control?Read the answer and worked solution →Unlike animal hormones, who can produce hormones in plants?Read the answer and worked solution →Are plant hormones nutrients?Read the answer and worked solution →Which tissue transports water and mineral solutes upward?Read the answer and worked solution →Which tissue can transport hormones between plant regions?Read the answer and worked solution →How do plant cells often move nearby signals between cells?Read the answer and worked solution →Where are many plant hormones often produced?Read the answer and worked solution →Which feature do plants lack for hormone production?Read the answer and worked solution →Which set lists five major plant hormone classes?Read the answer and worked solution →Which hormone class supports cell enlargement and root initiation?Read the answer and worked solution →What is the major effect of auxin on cell elongation?Read the answer and worked solution →Auxin from the growing tip inhibits which growth pattern?Read the answer and worked solution →A gardener removes the apical tip. What can happen to lateral buds?Read the answer and worked solution →Which hormone can promote adventitious root formation?Read the answer and worked solution →Which plant hormone is commonly used to stimulate roots on cuttings?Read the answer and worked solution →What can auxin cause a flower to develop after pollination?Read the answer and worked solution →What can high auxin concentration induce in axillary buds?Read the answer and worked solution →What do gibberellins promote in developing plants?Read the answer and worked solution →What can gibberellins break in seeds?Read the answer and worked solution →What can cold exposure do to gibberellin production?Read the answer and worked solution →In which tissue are cytokinins typically transported?Read the answer and worked solution →Which enzyme is stimulated in gibberellin-related starch breakdown?Read the answer and worked solution →Which reproductive process is influenced by gibberellins?Read the answer and worked solution →Which hormone group promotes cell division and shoot formation?Read the answer and worked solution →What can cytokinins delay in plant tissues?Read the answer and worked solution →

Worked practice questions

Why can water shortage limit a plant’s photosynthesis?

  1. Water replaces the leaf pigment
  2. Water affects flower colour only
  3. Water supply can limit photosynthesis
  4. Water forms only in the Calvin cycle
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Correct answer: C. Water supply can limit photosynthesis

Availability of water is one factor limiting photosynthesis.

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Which stage is photochemical and temperature-independent?

  1. Light-dependent stage
  2. Carbon-fixation stage
  3. Photorespiration stage
  4. Calvin-cycle stage
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Correct answer: A. Light-dependent stage

The light-dependent photochemical stage is generally temperature-independent.

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Which photosynthetic stage is temperature-dependent in this comparison?

  1. Water photolysis alone
  2. Light-independent reactions
  3. Light absorption alone
  4. Chlorophyll reflection
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Correct answer: B. Light-independent reactions

The light-independent reaction stage is temperature-dependent in that comparison.

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