Answer:# 1 is salt #2 is fresh #3 fresh #4 salty
Explanation:
Skin cells are also called epithelial cells
Answer:
Which of the following is an advantage of an in vitro experiment?
Variables and environmental conditions are controlled.
Explanation:
An advantage of in-vitro experiment is that the variables and environmental conditions are controlled because in-vitro experiment is performed outside a living organism with the environment in control
Answer:
Biotic and Abiotic factors
Explanation:
Biotic factors such as predators can limit the population size.
Abiotic factors such as drought,torrential rainfalls,climate change,dessication etc.
I am sure that it is not a or b and pretty sure that it isn't d so it is c