Nitrogen in the atmosphere must be "fixed" before it can be used by plants. atmospheric nitrogen is "fixed" by a) plants. b) bacteria. c) bacteria and insects. d) bacteria and lightning.

i need

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide

answer; cnidarians;

the correct answer is anaphylaxis.

anaphylaxis is a condition caused by insect bites, foods, medications, manifested by tongue swelling, shortness of breath, vomiting, low blood pressure. it sometimes may occur without an obvious reason. it is treated with epinephrine injection.other tretments include antihistamines and steroids,