Answer:
the part which allows the pollen is the stigma
The two organs have different adrenergic receptors for NE.
Sister chromosome exchanges are recombination events that occur between homologous chromosomes and are often the result of exposure of the cell to DNA damaging agents.
Cross over, or recombination, is the exchange of chromosome segments between non sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
The two types of crust are oceanic and continental, the lithosphere is composed of earth's crust and upper most mantle
An organ is a group of tissues working together to perform specific functions. An example of an organ is the heart.