Answer:
Double fertilization
Explanation:
The phenomenon of double fertilization is unique to flowering plants (i.e., angiosperms). Each pollen grain produces two male gametes (sperm cells), one of which fertilizes the egg to form the zygote, whereas the other sperm fuses with polar nuclei in the female gametophyte in order to form a triploid cell (3n) called endosperm. Subsequently, this endosperm will support embryonic growth by supplying storage nutrients and by serving as a mechanical barrier during seed development and germination.
The evidence of common ancestry is based on study of
three parameters; fossils record, homologies of various
organisms, and study of biogeography. Fossils record determines the similarity and differences of
bones as well as shells of different organisms over a given period of time. On the
other hand, studying of homologies involves assessment of mitochondrial DNA and
other proteins with an aim of finding similarity from one organism to
another. Finally, Biogeography is the
assessment of how continental drift might have separated organisms which had
got common ancestry and they were living together.
the term was coined by the Charles Darwin in which he specifies two reasons for an organism to survive and reproduce
1. Fitness. it is the ability of an organism to reproduce and survive in an environment
2. Adaptation. the inherited qualities and characteristics which increases chances of human survival.
the term is fitness
Answer:
The main difference between these two nutrients is that proteins are the building blocks of the body. Carbohydrates can do no good unless proteins are there to develop the body, its muscles and mass. Carbohydrates are needed by the body to make it run and function, while we need proteins to keep our muscles and glands healthy. Carbohydrates have a fairly limited range of uses which involves either structural support or energy release. Proteins, on the other hand, have infinite uses which range from enzymatic activity to structural support and formation of membrane channels to decomposing other molecules to numerous other cellular and muscular activities which are essential for a healthy body and mind.
Explanation:
