Q7 of 49 Page 1

Given below are a few statements related to external fertilization. Choose the correct statements.

i. The male and female gametes are formed and released simultaneously


ii. Only a few gametes are released into the medium


iii. Water is the medium in a majority of organisms exhibiting external fertilization


iv. Offspring formed as a result of external fertilization have better chance of survival than those formed inside an organism


i. The male and female gametes are formed and released simultaneously. Due to which the chances of fusion of the gametes increases.


ii. Many gametes are produced at once which increases the chances of fusion of the gametes. Even if some gametes are lost or are immotile.


iii. Water is the medium in most organisms exhibiting external fertilization as shown by fish, coral and sea anemone etc.


iv. Offspring formed as a result of external fertilization have lesser chances of survival than those formed inside an organism. They are born in open environment and are exposed to many predators all the time.


Hence, only statements i and iii holds true.

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The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively,

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The statements given below describe certain features that are observed in the pistil of flowers.

i. Pistil may produce more than one seed


ii. Each carpel may have more than one ovule


iii. Each carpel has only one ovule


iv. Pistil have only one carpel


Choose the statements that are true from the options below:


 9

Which of the following situations correctly describe the similarity between an angiosperm egg and a human egg?

i. Eggs of both are formed only once in a lifetime


ii. Both the angiosperm egg and human egg are stationary


iii. Both the angiosperm egg and human egg are mobile


iv. Syngamy in both results in the formation of zygote


Choose the correct answer from the options given below: