Humans are often referred to as "carbon-based" life forms. given that humans breathe oxygen, shouldn't humans be referred to as "oxygen-based" life forms?

Humans, alongside all other life on this planet, have carbon as the basic element found in every thing in their body. One may say that carbon is omnipresent within living beings. With us, we breathe oxygen as we need it for basic PROCESSES of life, whereas carbon provides the actual structures of the things which take in that oxygen. Without carbon as the base element of life, Earth's creatures and general environment would be very different. I honestly hope that this answer makes sense to you.

-M

gametes or germ cells are haploid cells (example: sperm and ova) containing only one set (or n) number of chromosomes and autosomal or somatic cells are diploid cells containing 2n number of chromosomes.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.