A protozoan that divides to form two daughters cells just like itself would be undergoing

All organisms have the same feedback mechanisms that help them maintain homeostasis.

Marizza181 [45]

I believe the answer is negative and positive feedback loops!

4 0

3 years ago

Fatty acid synthesis can be divided into 3 stages: Stage 1. Export of acetyl CoA from the mitochondria, Stage 2: Synthesis of ma

saveliy_v [14]

Answer:

The third stage in the synthesis of fatty acids is the synthesis of palmitic acid (letter e)

Explanation:

The synthesis of fatty acids takes place in the cytoplasm of the cell. The first step is the transport of acetyl-CoA to the cytoplasm. This came in the form of citrate usually from the pyruvate generated in the glycolysis from the mitochondria. The citrate is enzymatically transformed into acetyl-CoA.

Once the acetyl-CoA is in the cytoplasm, this is transformed into malonyl-CoA. This molecule will be the donor of two carbons in the synthesis of fatty acids.

In the final step takes place a cyclic process of reactions (condensation, reduction, hydration and second reduction) to synthesize the palmitic acid ( 16 carbons) by the fatty acid synthase.

4 0

3 years ago

What evidence is there that the 15 species of finch all evolved from one common ancestor?

antoniya [11.8K]

Darwin’s Finches: Darwin observed that beak shape varies among finch species. He postulated that the beak of an ancestral species had adapted over time to equip the finches to acquire different food sources. This illustration shows the beak shapes for four species of ground finch: 1. Geospiza magnirostris (the large ground finch), 2. G. fortis (the medium ground finch), 3. G. parvula (the small tree finch), and 4. Certhidea olivacea (the green-warbler finch) the Grants measured beak sizes in the much-reduced population, they found that the average bill size was larger. This was clear evidence for natural selection of bill size caused by the availability of seeds. The Grants had studied the inheritance of bill sizes and knew that the surviving large-billed birds would tend to produce offspring with larger bills, so the selection would lead to evolution of bill size. Subsequent studies by the Grants have demonstrated selection on and evolution of bill size in this species in response to other changing conditions on the island. The evolution has occurred both to larger bills, as in this case, and to smaller bills when large seeds became rare.