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astraxan [27]
3 years ago
8

Which of the following is the definition for speciation?

Biology
2 answers:
marshall27 [118]3 years ago
6 0
2. The evolutionary process through which new species emerge

PolarNik [594]3 years ago
3 0

The right option is; 2. the evolutionary process through which new species emerge

Speciation is an evolutionary process which results to the formation of new, distinct species that are reproductively isolated from one another due to reproductive barriers that are created as a result of physical, or genetic differences between the new species. The four geographic types of speciation are; allopatric, peripatric, parapatric, and sympatric speciation.

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In many cells, the adhesion to the extracellular matrix through integrins causes the activation of kinases in the cytoplasm. Thi
Pachacha [2.7K]

Answer: There is presence of tumor.

Explanation: The adhesion of cells to extracellular matrix (EMC) through integrins ( cell-EMC binding molecules, which are collagens, laminins and fibronectin) causes the activation of kinases in the cytoplasm.

However, kinanes helps in controlling the epithelial cell differentiation and upholding the epithelial tissues. This is done by the addition of phosphate groups to a substrate protein which is termed Protein phosporylation. Then, the kinases direct the affairs of the cell and it's activities. For example, it determines the cell division, anabolic and catabolic activities of the cell, movement of ions between the cell and it's environment (signal transduction), protein functions and etc.

Conclusively, since the activities of the cell like cell division and protein functions is dictated by the kinase, reduction in cell division that gave rise to rapid growth is put on hold. Hence, the tumor is been suppressed.

Note: the binding of cell-EMC is regulated by Transforming Growth Factor (TGF) β.

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4 years ago
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Tanzania [10]
I think the correct answer from the choices listed above is option A. Sickle cell disease is caused by a change in allele. It is a disorder of the blood caused by an inherited abnormal hemoglobin. Hope this answers the question. Have a nice day.
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3 years ago
What molecule is carbon dioxide used in
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