Answer:
There is little to no sunlight in the aphotic zone.
Explanation:
The aphotic zone is the deepest part of a lake/ocean, so no light is able to penetrate into those depths. Without light, photosynthetic organisms will not be able to undergo photosynthesis and will therefore not be able to survive.
During puberty the testes of the man will begin to produce testosterone. This causes hair growth in multiple areas of the body and the voice change. Similarly, women begin to grow hair but also begin menstruation.
Vein because they have valves to prevent back flow of blood.
Answer:
Numerous examples of this human-induced contemporary evolution have been reported in a number of 'contexts', including hunting, harvesting, fishing, agriculture, medicine, climate change, pollution, eutrophication, urbanization, habitat fragmentation, biological invasions and emerging/disappearing diseases.
Answer:
A question is developed from some observations and the hypothesis is a tentative explanation for that
Explanation: