it should be D.) hope the answer is right
Maybe immune system and respiratory system
<span>All extremities of the human body, including fingers, hands, arms, toes, feet, legs, ears, and the nose, could be examined by a nurse to confirm a diagnosis of frostbite. As frostbite is a condition of the skin, any exposed area should suffice to confirm the diagnosis.</span>
Keeping constant the number of chromosomes of the species and perform a summary of recombination, through crossing-over
( Swapping – increases the <span>genetic variability )</span>
hope this helps!
Answer:
Porifera or Sponges
Explanation:
Porifera is the phylum of the simplest multicellular marine animals. Their body is composed of two cell layers (something like tissues) and mesophyl between them. The body is in direct contact with surrounding water through the large number of pores and channels. What makes Sponges so simple is that their cells are unspecialized and that they don't have nervous, digestive or circulatory systems.
