The difference between a controlled variable and a constant is that a constant variable does not change through the experiment and a controlled variable can change.
Sorry for the bad hand writing :)
Answer:
23,46
Explanation:
because a gamete is a sex cell that contains half of the genetic material (haploid) as a normal body cell. So in humans, instead of having 23 pairs of chromosomes, a gamete only contains 23 singular unpaired chromosomes. So if you also multiply it by 2 you would get 46
Definition - the state or quality of something being humid.
Two things that increase humidity are
1) more water vapor in the air (more moisture)
2) lower temperature
Scientists will look for evidence like similar body or skeleton structures, internal similarities or maybe sometimes the whole heirarchy to confirm that two speices are closely related to each other.
For example ; in birds, scientists will look for type of feathers, body structure, beaks to confirm the similarity of two birds.
