Answer:
Natural selection is the process of which forms of life having traits that better enable them to adapt to specific environmental pressures, such as predators, changes in climate, or even competition for food or mates. As the species will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.
<span>Sensory and motor nerves make up the central nervous system.</span>
Answer:
Umami identifies foods that might contain essential amino acids.
Explanation:
You may have heard that our taste buds can recognize the four basic tastes: sweet, salty, sour and bitter. But what many still do not know is that the human taste recognizes one more taste - the "umami".
Umami is recognized by our taste buds when we eat foods that contain substances called aminoacids. The umami flavor is composed of three main substances present in various foods: glutamate, inosinate and guanylate. The ability to recognize umami taste is an evolutionary advantage of humans that represents the ability to identify foods that may contain essential aminoacids.
James Watson is credited with the discovery is the stricture of DNA.
he gibe the 3D structure of DNA in 1962 ,
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Answer:
By preventing the synthesis of DNA halting cell growth.
Explanation:
Fluorouracil and methotraxate prevent the synthesis of the neucleoside Thymidine thus preventing DNA replication and elongation. Methotraxate has a structure analogous to Folic acid which is important for thymidine synthesis. Thus, it acts as a competitive inhibitor on dihdrofolate reductase an enzyme that is essential for tetrahydrofolate formation, a folic acid derivative.
Fluorouracil acts by inhibiting thymidylate synthase which catalyses an essential step in Thymidine synthesis.
