Answer:
The behavior of chromosomes during meiosis and fertilization is responsible for most of the variation that arises each generation during sexual reproduction. Independent assortment of chromosomes contributes to genetic variability due to the random orientation of tetrads at the metaphase plate. or Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I .
Answer:
a. Coelom
Explanation:
The coelom is the body cavity contain coelomic fluid. The organisms have a true coelom called the coelomate animals. Coelom gives space and provides protection to the internal organs. The coelom is present between the mesoderm and alimentary canal of the organisms. The invertebrates such as annelids, arthropods, helminths, echinoderms, and vertebrates have a true coelom.
Answer:
Cuttings: Pieces of stem or root cut from a plant to produce new plants
Herbaceous cutting: type of cutting taken from plants that never form a woody stem
Leaf cutting
:a cutting that includes a short section of stem with a leaf attached
Stem cutting
: a cutting made from short pieces of thickened leafless stems containing at least one node.
Air layering
: a type of layering in which the stem is girdled, the cut is dusted in rooting hormone, and the dusted cut is covered with moss
