The evolutionary process where two unrelated species evolve similar traits independently, often due to adapting to similar environments, is called: MCQ with Answer and Explanation

Explanation:
Nitrogen fixation is the process by which atmospheric N₂ is reduced to ammonia, which is then converted into nitrates that plants can absorb. This can be biological (by bacteria like Rhizobium, Azotobacter), physical (lightning), or industrial (Haber-Bosch process). Nitrification is the oxidation of ammonia to nitrates. Ammonification releases ammonia from organic matter. Denitrification converts nitrates back to N₂.

Explanation:
The liver is the primary site of glycogen storage and releases glucose into the blood between meals (glycogenolysis) to maintain blood sugar. Muscles also store glycogen but for local use. The pancreas regulates blood sugar via insulin/glucagon, spleen stores blood and recycles iron, kidneys excrete waste.

Explanation:
Double fertilization in angiosperms was discovered by the Russian botanist Sergei Nawaschin in 1898 in Lilium and Fritillaria. One male gamete fuses with the egg to form the zygote, the other with the secondary nucleus to form the triploid endosperm. Strasburger discovered fertilization in flowering plants, Amici observed pollen tube, Hofmeister studied alternation of generations.