The answer is the fourth choice
Answer:
Explanation:
Astronomers use the entire electromagnetic spectrum to observe a variety of things. Radio waves and microwaves – the longest wavelengths and lowest energies of light – are used to peer inside dense interstellar clouds and track the motion of cold, dark gas.
46 chromosomes, but 23 pairs.
Answer:
Monomers are joined by a covalent bond, and a water molecule is produced