Q12 of 47 Page 73

A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?

Radish and carrot represent the homologous structure because both have similar design or structure though both are different species.

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10

New species may be formed if

i. DNA undergoes significant changes in germ cells


ii. chromosome number changes in the gamete


iii. there is no change in the genetic material


iv. mating does not take place

 11

Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following

i. Round, yellow


ii. Round, green


iii. Wrinkled, yellow


iv. Wrinkled, green

 13

Select the correct statement

 14

If the fossil of an organism is found in the deeper layers of earth, then we can predict that