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When moving across a selectively permeable membrane, ions, polar and large molecules cannot dissolve easily in the lipid membrabe. Instead, transport must occor by way of protiens that ac...

Gamete production is controlled by hormones in humans. The hypothalamus produces Gonadotrophin-releasing hormone (GnRH) which in turn stimulates the anterior pituitary gland to produce leutinizing horm...

DNA is a nucleic store of genetic information in eukaryotes. It consists of a combination of four different nucleobases; adenine, cytosine, guanine and thymine (abbreviated to A, C, G and T respectivel...

Scientists in labs use a technique called gel electrophoresis which allows them to separate a mix of DNA fragments by size.

This is used in conjunction w...

Energy is transferred throughout the food chain as animals at lower trophic levels are consumed by those at higher trophic levels. In every living organism, energy is taken in as food. But when one org...