The majority of fish reproduce by spawning, a process in which the female and male fish release eggs and sperm simultaneously in a protected environment with or without a complex courting ritual. Some spawners build nests to guard the fertilized eggs.Know More
Apart from building a nest, some spawners carry their embryos and their young around with them, while some, like the substrate spawners, scatter the eggs in the environment and do not guard the eggs or their young after spawning.
Live-bearing fish, which make up about 1 percent of all known fish species, mate to reproduce. The male inseminates the female through a modified fin called a gonopodium. The female livebearer stores the male's sperm and produces several broods of young fry, or newborn fish, from this single insemination.Learn More
Adrenaline, a natural stimulant created in the kidney's adrenal gland, travels through the bloodstream and controls functions of the autonomous nervous system, including the secretion of saliva and sweat, heart rate and pupil dilation. The substance also plays a key role in the human flight-or-flight response.Full Answer >
The function of the mucilaginous sheath of blue-green algae is to bind colonies together and to permit movement. The mechanism of this movement is not fully understood. The mucilaginous sheath is made of strands of cellulose and often bears pigments that give colonies of blue-green algae distinct colors.Full Answer >
Artificial embryo twinning is a method of making clones that mimics the natural process of creating identical twins, according to the Genetic Science Learning Center. It uses the same approach as natural cloning, but it is performed in a Petri dish rather than inside the mother.Full Answer >
Organisms have the ability to adapt to specific conditions within their environments through the biological process of variation, which enhance organisms' chances of survival. Variation is essentially a form of natural selection that takes place during long periods of time. Through the process of evolution, organisms retain the strongest traits and features that allow them to breed, find food, and survive in certain habitats.Full Answer >