Natural selection is the process that result in the adaptation of an organism to environment by means of selectively reproducing changes in its genotype, or genetic constitution. It is the a key mechanism of evolution. Charles Darwin popularised the term "natural selection" contrasting it with artificial selection, which is intentional, whereas natural selection is not.
To make it simple, let's have a group of beetle composing of green and some are brown as an example. here, there is a variation in traits. Since the environment could not support continuous population growth, not all species can reproduce to their full potential. Green beetles can easily be eaten by other species like birds compared to brown beetles. The surviving brown beetles will then generate brown offsprings because their trait has a genetic basis. Since more brown beetles survive and becomes more common in the population, the process continues until all individuals will eventually be brown. so basically, if you have variation, differential reproduction, and heredity, you will have evolution by natural selection as an outcome.
Experimentation to determine the temperature of stars
Answer:
A. Catabolic
B.Anabolic.
C. Anabolic
D. Catabolic.
E.Anabolic
F. Catabolic
G. Anabolic
H. Catabolic
Explanation:
Catabolic process is a metabolic processes that breakdown complex or larger molecules into smaller sizes by releasing energy.
The examples of such metabolic processes are;
Glucose is used as the primary fuel for energy
Dietary carbohydrate from a meal is digested and absorbed as monosaccharides, mainly glucose
Dietary protein from a meal is digested and absorbed as single amino acids.
Fatty acids are used as fuel sources for some tissues.
All this processes are catabolic processes because large molecules are broken to smaller ones and all this processes release energy.
Anabolic process is a metabolic process where smaller molecular are build up to form larger molecules and this requires the input of energy.
Examples are;
Glucose is used as the primary fuel for energy
Excess glucose is stored as glycogen in the liver and muscle.
Excess glucose is converted to fatty acids and stored as part of the triglyceride molecule in adipose tissue
Excess tatty acids combine with glycerol to form which are stored in adipose tissues.
All these processes requires the build up of smaller molecules to larger molecules and requires input of energy.
Answer:
ppss and PPSS
Explanation:
Just as indicated in the question above, Flies homozygous for singed and purple were crossed with flies that were homozygous for normal bristles and red eyes.
And a Drosophila mutation called singed (s) causes the bristles to be bent and misshapen.
A mutation called purple (p) causes the fly’s eyes to be purple in color instead of the normal red.
Thus, the genotypes of the parental flies in Cross 1 are
PPSS and ppss
Answer:
Yes.
Explanation:
Yes, this type of genetic engineering should be pursued in order to avoid decrease in death through infections or diseases as well as increase the production of milk and meat of that animals. With this genetic engineering, organisms have high resistance to diseases which decrease the cost of antibiotics. The positive effect of this genetic engineering is the increase in the resistance that leads to good health as well as productivity of organism.
