Question

Homologous organs have

• A. Same origin and same function
• B. Same origin and different function
• C. Different origin and same function
• D. Different origins and different function

Answer 1

The correct option is B

Same origin and different function

The correct option is B.

Explanations of correct options:

Option B:

1. Homologous organs are organs that evolve from the same ancestor.
2. They have the same organ structure but different organ functions.
3. Eg, the Forelimbs of humans, whales, cats, and dogs.
4. Homologous organs are a result of divergent evolution.
5. Humans use hands to pick up, whereas whale uses forelimb to swim, and cat and dog use forelimbs to walk.

Explanations of incorrect options:

Option A:

1. Individuals of the same species have organs with the same structure and same function.
2. They have the same common ancestor.

Option C:

1. The organs that have the same function but have different origins are known as analogous organs.
2. They have different structural organizations but similar functional properties.
3. Therefore, analogous organs are a result of divergent evolution.
4. They originate from a different common ancestor.
5. Eg, Wings of bats, birds, and insects.
6. All of these animals use their wings to fly but their origin and structure are different.

Option D:

1. These organs are structurally different from each other.
2. These organs perform different functions compared to one another.

Final answer: Homologous organs have the Same origin and different functions.