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9 questions · timed · auto-graded

Question 31 Mark
The timing and amount of animal hormone released are regulated by ………… $(CNS$, Energy, feedback mechanism)
Answer
feedback mechanism
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Question 51 Mark
......... have evolved in animals as efficient ways of functioning in the absence of true thought processes. (Elecctric signal, Reflex arc, spinal cord)
Answer
Reflex arc
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Question 71 Mark
......... is a growth-inhibitor hormone of plants. (cytokinin, gibberellins, Abscisic acid)
Answer
Abscisic acid
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Question 81 Mark
The responses of plants are not rapid for want of …….. (Chemical impulse, electrical impulse)
Answer
nervous system
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Question 91 Mark
The plants coordinate their behaviour against the environmental changes by using ………. (Control, hormones, Brain)
Answer
hormones
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Fill in the blank - Science STD 10 Questions - Vidyadip