In some plants,flowering is controlled by seasonal changes in relative day and night length,also called
A) phototropism.
B) gravitropism.
C) thigmotropism.
D) photoperiodism.
Correct Answer:
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Q4: When plants reproduce asexually,the offspring are called:
A)embryos
B)seeds
C)clones
D)carpels
Q20: Which of these has evolved in angiosperms
Q22: Your brother asks you to bring him
Q22: Once a pollen grain reaches the stigma
Q23: The house plant Kalanchoe daigremontiana produces _
Q26: In plants,hormones are produced in endocrine glands.
Q28: The _ and _ give rise to
Q29: When pollen from a flower's anther pollinates
Q33: Which of the following plants produces seeds
Q42: The response of plants to touch is
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