Answer:
Two ureters.
These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys. If urine backs up, or is allowed to stand still, a kidney infection can develop.
Explanation:
Answer:
Explanation:
Types of Mutations. There are a variety of types of mutations. ...
Chromosomal Alterations. Chromosomal alterations are mutations that change chromosome structure. ...
Point Mutations. A point mutation is a change in a single nucleotide in DNA.
<span>This behavior is an example of B. overproduction. The frog lays thousands of eggs, which is much more than it needs, or would need in perfect conditions. However, most of those eggs doesn't survive, and little frogs are never born in that case. This is why it has to have a lot of eggs so as to ensure that a decent number of offspring survives so as to continue the species.</span>
A. The mutation that occurs during meiosis is a sure way of gene splitting I presume:)