Explanation: Intracellular receptors are type of receptors found in the nucleus of a cell. Receptors are protein molecules to which a biological molecule or ligand binds to elicit biological response. Most receptors are present on the surface of a cell, this class of receptors are called extracellular or surface receptors. Intracellular receptors are receptors for steroid hormones and other water-insoluble hormones that can readily pass through the plasma membrane of their target cells through simple diffusion to reach their receptor proteins in the nucleus. A steroid hormone binds to a site on its specific receptor protein in the nucleus to form a hormone-receptor complex. The binding of the hormone triggers a conformational change in the receptor protein thereby enabling the binding of highly specific DNA sequences called hormone response element.
In a rooted phylogenetic tree, each node ... phylogenetic tree that explicitly represents evolutionary time through its branch spans. A spindle diagram (often called
Primates with opposable thumbs include great apes -- chimpanzees, bonobos, orangutans and gorillas -- and Old World monkeys like baboons and Colobus monkeys.
The variety of species of mice around the world demonstrates the creatures' remarkable ability to adapt to different climates, altitudes and food sources.
ATP is the main energy-storing molecule found in all living organisms. It transports the energy necessary for all cellular metabolic activities. It is made through the process of photosynthesis using energy from sunlight, or through the process of cellular respiration in the mitochondria of a cell.