Ap Biology Research Paper

2a. If sunlight were to disappear almost completely, it would leave lasting effects on many organisms such as an earthworm, a shark, a maple tree, a saguaro cactus, or a teenager. While looking at an earth worm, the short term effects would be beginning to see more of the species during the day. Earthworms are nocturnal, so they live beneath the surface when it is daylight and come out once the sun goes down. Because of this in the long run, the earthworm species would eventually become overpopulated; they would be above the surface more, so they would have more time to reproduce. According to research, sharks’ skin can change color when exposed to sunlight, similar to the way humans tan, and they can develop skin cancer as well. Looking at short term and long term effects, at first sharks would begin to reduce the amount of color change seen to their skin, and eventually, skin cancer rates of this species would decrease. Changing from animals to plants, a maple tree would experience effects as well. Sunlight is important to this type of tree due to the pigment and their need to change from green to red leaves. If sunlight were to disappear, at first it would be noticeable how the leaves were not changing from green to red, at least not as much. A more long term effect would be stunted tree growth because trees need sunlight to grow

Societies in a “hunting and gathering” stage have lower populations than societies in “agricultural societies” for reasons as explained in the Demographic Transition Model. Stage one societies (hunting and gathering) have low populations due to their inconsistency in having food to eat. They reproduce less children for fear of not having enough resources to sustain them. Stage two societies (agricultural revolution) have a sudden boom in population growth due to people educating themselves on how to grow food and make better choices as far as raising a family goes. It is not uncommon for families in this stage to have 6-8 kids