Answer:
D
Explanation:
It is often like this: cell->tissue->organ->system
Mountain lions with lots of variation because variation is important for species’ survival. If there is an environmental change that negatively affects organisms with a certain trait, variation can insure that the entire species will not be wiped out because some organisms within that species might not have that trait and can survive.
There won't be any Photosynthesis occurring and plants and tress will eventually die.. When the plants die the omnivorous animals will die of hunger..... Also we will be suffering from famine
Answer:
D
Explanation:
it regulates the flow of water into the cell
True. feces, also known as excrement are the product of excretion.