Q1 of 26 Page 284

The organs which perform different functions but have the same basic structure are known as:

Homologous organs are those organs which have the same internal structure but perform different functions. These organs share a common ancestry in multiple organisms. They possess a similar structure of origin.


Modification of forelimb in different organisms

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1

In human being sex is determined by;

 1

The Human Species have genetic roots in:

 1

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

 1

New species may be formed if:

i. DNA undergoes significant changes in germ cells


ii. There is no change in the genetic material


iii. Change in number of chromosomes


iv. Mating does not take place