In, 1898 the Russian cytologist S. G. Navashin discovered double fertilization in angiosperms, which consists in the union of a sperm-ucleus with an egg cell nucleus and the union of a second sperm nucleus with the nucleus of an endosperm-producing cell.
Bioculture is the combination of biological and cultural factors that affect human behavior. Bioculture is an area of study bounded by the medical sciences, social sciences, landscape ecology, cultural anthropology, biotechnology, disability studies, the humanities, and the economic and global environment.
Most U.S. marine aquaculture is shellfish while a small percentage is marine finfish. Aquaculture -- also known as fish or shellfish farming -- refers to the breeding, rearing, and harvesting of plants and animals in all types of water environments including ponds, rivers, lakes, and the ocean. Researchers and aquaculture producers are farming all kinds of freshwater and marine species of fish, shellfish, and plants. Aquaculture produces food fish, sport fish, bait fish, ornamental fish, crustaceans, mollusks, algae, sea vegetables, and fish eggs.