Class 12

Introduction Polyembryony is a common phenomenon that mostly occurs in plants when two or more embryos develop from a single fertilised egg. In case this happens in humans during reproduction, this leads to the birth of identical twins. Polyembryony definition Polyembryony occurs when two or more embryos develop from a single fertilised egg. This natural […]

A plasmid is a small extrachromosomal DNA molecule that may reproduce independently of chromosomal DNA while remaining physically separate from it. Plasmids are small circular double-stranded DNA molecules that are present in bacteria, archaea, and eukaryotic cells. Plasmids usually carry genes that help an organism survive and provide a selection advantage, such as antibiotic resistance,

Reproduction is the biological process through which living organisms generate additional members of their species. There are two methods for plants to reproduce: asexually and sexually. Sexual reproduction in plants is characterised by alternating generations of multicellular haploid and diploid cells. The female gametophyte in angiosperms is the embryo sac, whereas the male gametophyte is

We see different types of physical and chemical changes in our surroundings like dissolving sugar and water, burning of coal, rusting, melting associate square block, boiling water, completely different form and size of the Moon, etc., amendment is happening all around America on every occasion. We should always attempt to understand the terms that are

Maturation of Egg refers to the entire process of an egg’s development from its conception (gametogenesis or oogenesis) to its maturity and finally fertilisation. Oogenesis is the type of gametogenesis in which ova, also known as female gametes, are produced, and the female gamete that is produced is referred to as an ovum. Oogenesis is

The concept of manifestation—that is, turning an idea into a physical reality—is based on science. Here are some research topics and how they contribute to manifestation: A growth mentality can assist you in realising your aspirations and achieving your objectives. Dr. Carol Dweck’s research clearly shows that believing you can do something increases your chances

Strictly speaking, sexually transmitted infections (STIs), also known as sexually transmitted diseases (STDs) or venereal disease (a term that dates back to the 1800s), are infections spread through sexual activity, particularly vaginal contact, anal contact and oral contact. The fact that STIs frequently do not manifest themselves with symptoms increases the likelihood that the infection

A roundworm is also known as Ascaris lumbricoides. It is a nematode roundworm and belongs to the family Ascarididae. Roundworms are endoparasites found in human beings, pigs, sheeps, cattle, and so on. It generally lives inside our small intestine, where it feeds on semi-digested food. Here, it can grow up to a length of more

Animals have two basic cell types: somatic cells and germ cells. Somatic cells are formed during asexual reproduction by mitosis, whereas germ cells are formed during sexual reproduction by meiosis. The term vegetal cells refers to cells that are not somatic.The main distinction between somatic and germ cells is that somatic cells are engaged in the

The oviducts are a pair of tubes that run from near each ovary to the uterus’s apex. Fallopian tubes are named after the sixteenth-century anatomist Fallopius.  Each oviduct is roughly 10 cm (4 in) length and has a drinking straw-sized diameter.  Along its length, an oviduct can be separated into many parts. The oviductal infundibulum