Answer:
Cleavage is a process in which cell is divided into several parts without increasing in size. There are 4 stages of cleavage i. e. 2-cell, 4-cell, 8-cell and 16 cell stages. 2 cell embryo cleavage occurs after 30 hours of fertilization. 4 cell embryo cleavage occurs after 48 hours. 6 cell embryo cleavage occurs on third day of fertilization. 8 cell embryo cleavage occurs on fourth day of fertilization and more than 100 cells are formed.
A. alleles are variations of a gene trait
Answer:
Roses and lilies are seed-producing, flowering plants, hence, these plants are angiosperms. Presence of flowers is the major characteristics of angiosperms, in which male and female reproductive organs are present.
<span>A nerve is a bundled unit of nerve fibers located in the ide peripheral nervous system of the brain and spinal cord, connecting various parts of the body. These are the axons and are cable-like bundles which provide a way for all the electrochemical signals. They are of 3 types: afferent, efferent and mixed nerves. </span>
