Answer:
Embryonic stem cells could be used to make more specialized tissues that have been lost to disease and injury. For tissues that are constantly replaced, like blood and skin, stem cells would probably be replaced directly. ... Embryonic stem cells could be grown into more specialized cells for screening potential drugs.
Explanation:
Following general conditions are necessary for natural selection to occur in population:
- More organisms are born than can survive.
- Organisms vary in their characteristics, even within a species.
- Differences in reproduction and survival are due to variation among organisms.
According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
Galapagos Finches: The Galapagos finches studied by Darwin on his famous voyage are probably the most common example of natural selection.
Characteristics of human hair such as length, curliness, density, and color are some of the different factors in classifying human hair. Hair can also be classified as to where it grows (such as terminal and vellus hair), and when it grows (like lanugo hair for infants in the womb).
