These chemical messengers of the body are produced by endocrine glands
a. hormones
b . neurotransmitters
c. adenosine tri-phosphates (atp)
d. acetylcholines
a. hormones

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

In pea plants, yellow seed color (y) is dominant and green seed color (y) is recessive. based on the punnett squares, what are the chances that the offspring in the second generation will have green seeds? first generation y y y yy yy y yy yy second generation y y y yy yy y yy yy there is a % chance that the offspring will have green seeds.

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled