Answer:
Ribonucleotides (RNA) and deoxyribonucleotides (DNA). See more details below, please.
Explanation:
Ribonucleotides are the nucleotides of the RNA (they have pentose, ribose and nitrogenous base, except for Thymine; they contain uracil). Deoxyribonucleotides are the nucleotides of DNA (they have pentose, deoxyribose and nitrogenous base, they have Thymine).
Answer:
because some people making it a addicted thts why growing
Explanation:
sana naka tulong
Selectively permeable <span>membranes can be found around a variety of cells and places. The most common </span>example is the phosphoric bi-layer cell membrane that surrounds every cell in our bodies. Another example<span> of a </span>selectively permeable membrane is the inner membranes of an egg.<span>Selectively permeable membranes can be found around a variety of cells and places. The most common example is the </span>phospholipid bilayer<span> cell membrane that surrounds every cell in our bodies. Another example of a selectively permeable membrane is the inner membranes of an egg.</span>
Answer:
Occurrence and accumulation in time of new mutations in each of the separated populations. This leads to a gradual differentiation.
Explanation:
Allopatric speciation consists of the geographic separation of an original population so that it can give place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate populations, or geological events. In this speciation, some barriers impede genetic interchange, or genetic flux, as the two new populations that are separated can not get together and mate anymore. These barriers might be geographical or ecological.
The process of allopatric speciation involves different steps:
- The emergence of the barrier,
- Interruption in the genetic interchange,
- The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation,
- Genetic divergence by natural selection and reproductive isolation, which makes it impossible for the two groups to cross even if the barrier disappears,
- Prezigotic isolation mechanisms favored by selection once it occurs a secondary contact between the new species in formation.
