Answer:
A
Explanation:
they are associated with venous sinuses.this valve open one way flow of direction of the heart.
An analogy that can link with the process of respiration can be a factory. For example, the way that the factory processes raw goods to make manufactured goods is similar to how the respiratory system takes in molecules and breaks it down into energy.
Answer:
B
The loss of biodiversity due to deforestation will likely decrease the number of new medicines available in the future
Explanation:
Answer:
The most obvious one is that asexual reproduction is where an organism gives birth by itself. Normal reproduction includes two organisms mating.
I know nothing else.
The atmosphere, it holds all air on earth and keeps life livable by protecting use from the suns rays. The answer is atmosphere. :)
