Answer:
- Interruption in the genetic flow between separated groups
- The emergence of new mutations in each of the groups, and their accumulation in time. Slow and gradual differentiation between populations.
- Genetic divergence by natural selection and reproductive isolation
- Prezigotic isolation mechanisms
Explanation:
Allopatric speciation consists of the geographic separation of a continuous genetic background that 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 groups 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 that affect organisms:
- 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 makes it impossible for the two groups to mate even if the barrier disappears.
- Prezigotic isolation mechanisms will be favored by selection if occurs a secondary contact between the new species in formation.
Answer:
bacteria, archaea, plants, protists, animals, and fungi,
Explanation:
Answer: D
Carbolic reactions breaks larger substances to smaller ones.
Anabolic reactions forms larger compounds from smaller units.
DNA synthesis does not involve breaking down of sugars.
Dehydration is a umbrella term used for reactions that releases water as a byproduct. In the case of sugars, they are held by Glycosidic bonds. To break them, hydration is needed as 1 water molecule breaks 1 glycosidic bond. The process of forming large units of sugars involves dehydration to form the glycosidic bonds. Therefore option d is wrong.
DNA guiding production of protein is definitely wrong as this process doesn't cause sugars to break down at all.
Sarcoidosis can<span> easily be </span>mistaken for other systemic and especially metastatic disease.
Metastatic disease is w<span>hen many cancer cells are found in one or more nearby lymph nodes, it is known as regional </span>disease<span> or stage III cancer. Cancer cells can travel to lymph nodes far from the primary tumor or to other organs or tissues in the body, where they collect to form a </span>metastatic<span> tumor.</span>