Answer: a
Explanation:
the length of a cobra doesn't help with the study of life. The moon doesn't either because there is no life on the moon. And how fast the earth rotates is more of a earth science question. I hope this somewhat helps
Add different kinds of soil to three potted plants
Dorsal means back as in the back area. Example~ Many dolphins have a pronounced beak and all have a central dorsal fin and sharp teeth for feeding, mainly on squid and fish.
Answer:
A crayfish
Explanation:
everything else is an insect
It is difficult to control all variables except the one being tested. Hope this helps.
