Answer:
The answer must be c: natural selection
Explanation:
All the other answers only help rappid food production which will lessen the use of natural selection over time.
Answer:
In Manchester England in the 1840's there were factories that used coal which coated the trees. This allowed the darker moths to hide better against the trees than the lighter moths which were eaten by birds.
Explanation:
The salt in the ocean comes from the rocks on land. The rain that falls onto land caontains some kind of dissovled carbon dioxide from the air. And that causes the water to be a bit acid to carbolic acid. Also rain replenishes freshwater in rivers and streams, so they don’t taste salty. However, the water in the ocean collects all of the salt and minerals from all of the rivers that flow into it.<span>
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ok yeah we know you know that bro I know it's fun right
Answer:
The correct option is C. receptor dimerizaton.
Explanation:
Growth Factors are protein substances found in our blood and play an important role in intercellular communication. These protein substances bind to receptors on the surface of the cell, with the main result of the activation of cell proliferation and / or differentiation. Many growth factors are very versatile, stimulating cell division in numerous different cell types, while others are specific to a particular cell type.
For the activation of a growth factor, dimerization or oligomerization of the receptor is necessary for kinase activity to occur, triggering intracellular signaling cascades. The dimerization can be between two identical receptors (homodimerization) or between different members of the same family (heterodimerization). The dimerization of the receptor, leads to the activation of its tyrosine kinase and the transphosphorylation of the tyrosine residues, releasing a signal transduction into the cell.
