Question

out of the forelimb of human, wings of an insect and forelimb of a bat, which two are homologous organs? why? how do these organs help in understanding evolutionary sequence?

Answer 1

A Homologous structure is an organ or organ system present in organisms which share a common ancestry. These have a similar structure but different functions in different organisms. They usually appear because of divergent evolution and have same origin. A few examples are:

   Vertebrate limbs

All the higher vertebrates have a similar skeletal structure of their forelimbs but humans use them for holding things, cats for walking, whales for swimming while bats use them for flying.

   Brains

All vertebrates have a similar structure of the brain with all the lobes, pituitary gland, cerebrum, cerebellum, medulla etc.

   Hearts

All vertebrate hearts are made up of auricles and ventricles.

   Leaves

Venus fly trap and pitcher plants have modified leaves which help in capturing insects while cactus leaves are modified into spines to put a check on transpiration.

Answer 2

Forelimb of human and bats are homologous organs.

Explanation:

• The homologous organ may be defined as the organ that have structure bu perform different functions.
• The homologous structure are originated from the common structure.
• The forelimb of the vertebrates shows the homology in their structure as they have same structure.
• The homologous structure shows the divergent evolution and can be helpful in finding the ancestory.

# Learn more with brainly about homologous structure:

https://brainly.in/question/2884722.

https://brainly.in/question/13516930.