A, I think cuz we used glass slides in my high school for microscopes.
Answer:
Shape, Size, Height, Type of Food
Explanation:
The color is the variable and the type of hummingbird can't be controlled.
Answer:
Population is defined as a group of organisms, which belong to the same species. Example- Human population includes a group of organisms that all belong to the species sapiens
Explanation:
Here are at least 2:distribution,and Mating Patterns.
Well for starters that is not DNA it is RNA so it has already been transcribed, so your answer should be replication.