Light excites the electrons in chlorophyll a molecules of photosystem 1. As these electrons move to another primary electron receptor, electrons from photosystem 2 replace them.
Therefore the answer is FROM PHOTOSYSTEM 2.
Answer: A. Glycerol and Fatty Acid
It is true because mitosis creates exact replicas with no genetic variation.
Mutation is needed for evolution to occur to ensure that strong species will dwell within the environment. Though this has little effect on allele frequencies, mutations still ensure the biodiversity of species. The theory of natural selection in a way proves this.
Answer:
Agriculture is the main source of national income for most developing countries. However, for the developed countries, agriculture contributes a smaller per cent age to their national income. Agricultural sector provides fodder for domestic animals. Cow provides people with milk which is a form of protective food.
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