No it is not. For example humans have 46 chromosomes and some dog breeds have 78.
The nerves are pretty much responsible for everything. You're nerves sense pain and all of that. I'm not really good at explaining it, but it's the nervous system. I know what I'm talking about because I'm taking a med class in high school. Hope this helped.
The answer is C) covalent bond
Photosynthesis takes place in the chloroplasts
Depends on the beetle, but I would most likely say plants.