B, because species b has a higher percentage of survivors to old age than species C. Species a still has a higher rate than species C so the answer is b.
Answer:
The correct answer is- Immune system
Explanation:
There are physical, chemical and immunological barriers present in our body which helps us to protect from the foreign antigen. They all assist each other and helps in pathogen removal from our body.
The physical barrier includes skin, gastrointestinal tract, respiratory tract, etc which do not allow the microbe to enter the body. Chemical barriers include tear, saliva, acid in the stomach which kills microbes on the body surface.
Immune cells like macrophages, B cells kills microbes when it gets in the body. Lymphatic system also contain immune cells and helps in microbe removal.
So the immune system is assisted by physical barrier, chemical barrier, and lymphatic system.
While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases oxygen
<span>seafloor spreading
Ayeeee!!!!!!!!!!!!!!!!!!!!</span>
Answer:
A
Explanation:
Since mutations do occur it is likely that a mutation of height will occur
