Introduction. Before the introduction of solid waste management, it’s imperative to have an understanding of solid waste. Solid waste is the range of garbage arising from human and animal activities that are discarded as both unwanted and useless. Solid waste is generated from residential, industrial, and commercial activities in a particular area. Solid waste is … Read more
Spermatogenesis, the basic and development of the sperm cells in the male reproductive organs, also known as the testes. The testes are made up of numerous thin, tightly coiled tubules called seminiferous tubules; the sperm cells are formed in the walls of the tubules. Within the walls of the tubules, also, are many randomly … Read more
Single-cell protein refers to protein gotten from cells of microorganisms like yeast, fungi, algae, and bacteria, which grown on various carbon sources for synthesis. SCP production may have the potential for feeding the ever-increasing world population. Some quantities of SCP can be produced in a single day. As a source of protein, it is very … Read more
The arouse for seed and fruit formation was the act of fertilization. This resulted to fertilization of double cangiosperms which produces two structures. That is, a diploid zygote or oospore and a triploid primary endosperm cell. Nutritive tissue which is also called endosperm is realized as a result of the process. The embryo is forms … Read more
In the process of sexual reproduction, new organisms are created by the combination of genetic information, from the two parents of the different sexes. Chromosomes present in the gametes which are the specialized sex cells carries the genetic information. The gametes of females are eggs and gametes of the males are sperms. During the … Read more
Haemophilia is a Sex-linked inheritance and an inherited bleeding disorder where the blood doesn’t clot properly. This is caused when blood does not have enough clotting factor. What is A clotting factor? A clotting factor is a protein in the blood which controls bleeding. Haemophilia has two types. Both of these two types possess … Read more
In human beings Sex determination is due to sex chromosomes. Therefore, it is a genetic mechanism. In biology, it is a system which decides the sexual characteristics of an organism or offspring. Genes which are inherited from the parents determine whether a progeny will be a boy or a girl. Genes for every characters is … Read more
In honeybees,haplodiploidy system is used to see the sex of the offspring. The drones (males) are completely obtained from the queen, specifically their mother. The diploid queen has 32 chromosomes in total whereas the haploid drones have 16 chromosomes. Drones create sperm cells that have their whole genome, so the sperm are all genetically … Read more
In birds the sex chromosomes are controlled genetically and the structure of determining an offspring is contradictory to that in mammals: the male is the one with homogametic sex (ZZ) where the female is heterogametic (ZW). THESE sex chromosomes are designated as Z and W. The males are ZZ on the other hand the … Read more
Plants create seeds that may grow into new plants, however if the seeds simply fall to the bottom beneath the parent plant, they may not get enough sun, water or nutrients from the soil. Because plants cannot walk around and take their seeds to different places, they need developed different strategies to disperse (move) their … Read more