<span>Proteins are different based on number and type of ____________ contained in their polypeptide chain(s)
</span>Amino acids
The measurement of the force of gravity pulling down an object is called weight, which is basically what you see when you step on a scale.
Answer:
option A they have developed from the same organism
Explanation:
Organs of animals (belonging to different species) which have similar structure but different functions are homologous organs. Such organs have evolved from the same ancestors , however their function are different.
For example – wings of bats, limb of human etc.
Here in this case also the bone structures of human, cow, and horse are same but their functions are different, thus they are homologous organs and hence they have evolved from same ancestors.
The correct answer is option A
The foreign molecule that activates the immune system are Antigens.
