Class 12th Biology 2018 Set1 Delhi Board Paper Solution
If 8 individuals in a population of 80 butterflies die in a week, calculate the death rate of population of butterflies during that period.
If 8 individuals out of 80 butterflies dies in a week. The death rate of population will be 8/80 it will be 0.1%.
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(c) Behavioural adaptations in animals
(d) Importance of light to plants
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- Q:-
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
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(e) Zygote is __________. (diploid/haploid)
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(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
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