Answer:
B. (The first one)
Explanation:
the only thing that is different from the two perish dishes are the temp. this is the independent variable. the dependent variable is the result. in this case, the amount of bacteria after three days
Answer:
A healthy ecosystem consists of native plant and animal populations interacting in balance with each other and nonliving things (for example, water and rocks). ... Decomposers break down dead plants and animals, returning vital nutrients to the soil. Plants take up these nutrients, along with water, through their roots.
Explanation:
Go to the Prenatal Testing page for more details. If one parent has sickle cell trait (HbAS) and the other has sickle cell anaemia (HbSS) there is a one in two(50%) chance that any given child will get sickle cell trait and a one in two chance that any given child will get sickle cell anaemia.
They are decomposers that eat the dead or decaying matter in the ecosystem.