Answer:
The family solanaceae contributes several important food, drug and ornamental plants to human race. Hence this family is considered as economically important. Solanum species: Solanum tuberosum is most important food crop after cereals
Explanation:
Answer:
Messenger RNA (mRNA), molecule in cells that carries codes from the DNA in the nucleus to the sites of protein synthesis in the cytoplasm (the ribosomes).
Explanation:
Answer:
The fusion event is when the virus membrane and the host cell membrane fuse together allowing a virus to enter. It does this by attachment or adsorption onto a susceptible cell; a cell which holds a receptor that the virus can bind to.
Explanation:
Answer:
Crossing over and random alignment are the events of meiosis-I that add new gene combinations to the gametes. Random fusion of male and female gametes is called random fertilization.
Explanation:
During the pachytene stage of meiosis-I, part of the chromatids of each of the homologous chromosomes of a bivalent is broken apart and exchanged. This exchange of the genetic material between the members of a bivalent is called crossing over. The recombinant chromatids formed by crossing over have new allele combinations that were otherwise not present in the parental chromatids.
During metaphase I, the homologous pairs are aligned at the cell's equator in a random manner. This means that either the paternal or maternal chromosome of a pair may face one or the other pole of the cell. The arrangement of chromosomes during metaphase-I determines whether the paternal or maternal chromosome of each pair would be distributed to one or the other pole of the cell. This random segregation creates new gene combinations in gametes.
All the gametes have equal chances of getting fused with a gamete from the opposite gender. This is called random fertilization and further adds variations.
Answer:
Rainforest
Explanation:
Sunlight is a major limiting factor in the rainforest due to a very dense canopy created by taller trees and thus sunlight is blocked from reaching the rainforest floor making underbrush growth sparse. In rainforest, plant growth is confined to the surface due to limitations of light penetration as light intensity decreases with depth.
