One of the major elements of natural selection is that all species have genetic variation. Natural selection is a process when organisms adapt better to their environment. It is an essential key in evolution. There is a change in phenotype of a population over time.
<em>A placental mammal develops before its body systems can function independently;</em>
A. Inside it's mothers body
<u>Mammals don't come from eggs, and the term placental mammal means it has a placenta. It comes out when our mothers deliver. A marsupial mammal forms in a pouch, so the answer is inside it's mothers body </u>
If you categorize humans into large groups based on physical characteristics such as facial features and hair texture, you are relying on which form of categorization?
A. political identity
B. race
C. class- consciousness
D. ethinicity
Answer:
B. Race
Explanation:
Human races are the distinct human populations that are classified and are different from each other with respect to one or other morphological traits. It generally takes into account of the traits such as skin color, hair structure, etc. Mongoloid and negroids are two races of the human that are found in distinct geographical regions and exhibit some distinct traits that are not expressed in the humans of other races. This classification does not consider the ability of mating to produce fertile progeny.
I would go with the second one cuz
DNA<span> and RNA </span>consists<span> of nucleic acid </span>chains<span> called nucleotides. Nucleotides are </span>composed<span> of three units: base, sugar (monosaccharide) and phosphate. Bases are found in both </span>DNA<span> and RNA. </span>
