Answer:
haploid diploid half sex reduction
Explanation:
Valves ensure blood flows toward your heart. Vein valves work to bring the blood that flowed down via arteries back up to your heart.
C, Algea... DO NOT HAVE ALCOHOL... Thank you and hopes this helps XD
Answer:
Animals making the territory with example Lion, Tiger, hyena among others
Explanation:
Animals marks their territory through secretion of pheromones, some makes sound, it is a form of behavioral act that allows to protect ones territory or boundary