<u>Sunspots</u> are temporary phenomena on the photosphere of the Sun that appear as dark spots compared to surrounding regions. They are caused by intense magnetic activity.
Well I dont know exactly how you modeled your model in this activity (also, I notice this is a question from 2016), but I do know the two processes.
This is the process of making glucose in plants. Photosynthesis goes through two individual stages:
Stage 1: L<span>ight dependent reaction</span> (depends on the presence of light; it can’t happen in the dark)
Stage 2: Light independent (dark reaction) (works in the absence of light, but calling it a dark reaction might be misleading; It can just as well happen in the presence of light).
Explanation:
this is cheeeeeeeeeeemistry
They have increased need to carbohydrates, protein, water and iron.
Carbohydrates is the primary source for energy and active people apparently need more energy for their daily activities.
Protein helps build muscles, even though they only need a small amount more of protein than normal people, they still require protein for muscle buildings.
Water has to be needed as they may excrete more sweat by active activities in the day time. Water can also help remove waster material from body.
Iron helps the production of hemoglobin, which is in the red blood cells that help transport oxygen. As they exercise more, they need more oxygen supply for respiration, therefore there is a need for iron supply.
C. The presence of predators could cause natural selection because it would mean survival of the fittest.