An organism or cell with two sets of Chromosomes is a mutation or a genetic defect. <em>Hope this helped you!</em>
3 is the answer because they play a key role in the nitrogen cycle.
Answer:
Sunlight is the main role. Sunlight passes through the leaves and then goes through the rest of the plant.
Explanation:
PHOTOSYNTHESIS
6CO2 + 6H2O + light energy = C6H12O6 + 6O2
Answer:
Recent studies have shown that dark skin colour was developed in the past for protection against cancer. Scientists claim that in the past natural selection favoured humans having dark colour as compared to humans having a fair colour. This is because humans having a darker colour produced more melanin which protected them from ultraviolet radiation. As a result, this skin colour protected more against skin cancer. Hence, Having a darker skin colour protected in survival and reproduction to people thousands of years ago.
The theory of tectonic plates explains that large convectional currents occuring in the mantle(as a result of magma) are the reasons plates,and so continents,are moved. Note movement occurs in the boundary in between the plates.