The two ways that oceanographers can identify ocean currents are by mapping the path of debris from vessels and by studying the chemical and physical components of the ocean water.
The process of meiosis is the cell division that prepares the species for sexual reproduction. Through meiosis cells goes from diploid (2n) cells to haploid (n) gamates. Each daughter cell carries exactly one half of the genetic material from the mother cell. In females the result of meiosis is the production of egg cells, where in the male, the result of meiosis is the production of sperm cells.
The answer should be a. receptor sites in the surface of the cell
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Answer:
A. You remind him that a mutation that increases the expression of a single proto-oncogene is generally not sufficient to cause cells to become cancerous. He should also cause some mutations in the mouse's DNA that cause increased expression of some of the mouse's tumor-suppressor genes.
Explanation:
To begin, mutation can be defined as the changes in genetic composition and/or structure of an organism. Now, we have a scenario a strain of mutant mice is developed in a bid to culture cancer and develop cancerous treatment to the effect. Thus, after causing mutation in a mouse, it is disappointing to know that in spite of this, there's no cancer development.
Hence, it is in the light of this that the scientist need to be reminded that a mutation that increases the expression of a single proto-oncogene is generally not sufficient to cause cells to become cancerous. He should also cause some mutations in the mouse's DNA that cause increased expression of some of the mouse's tumor-suppressor genes.
Option A is therefore the most fitted.