<span>a. direction in which they carry impulses</span>
The correct answer is C. Because spermatozoa and developing cells produce surface antigens that are recognized as foreign by the immune system.
This is important because the organism will react defensively towards the foreign bodies and fight them instead of accept them, so this will make a big problem in the process of fertilization.
Answer: Seral stage
Explanation:
The seral community commonly known as sere. It is an intermediate stage which is found during the ecological succession in an ecosystem.
This is an intermediate stage that comes before every stage of ecological succession advancing towards its climax community.
It starts with the pioneer species and keeps on evolving until climax community is attained.
Hence, the correct answer is option C
Answer:There are so many different kinds of dogs because we've been breeding different kinds overtime.
Explanation:
There is so much diversity in dogs intentionally. Dogs have been a companion of humans for hundreds, maybe thousands of years. We learnt to breed different kinds for different purposes, hence the diversity of dogs.
Answer:
physical energy and potential energy
Explanation:
you use these two energies in physical stunts like hammering a nail
