Answer:
Electrons Can Donate - 0
Electrons Can Receive- 2
Valence - 2
Explanation:
The electronic configuration of oxygen is 
. Thus in the p-orbital there is deficiency of two electrons. Hence, it can receive/share electron but it cannot donate electrons. This makes oxygen as a good electron acceptor. Since there is a deficiency of two electrons in the outermost shell of oxygen, the valence of oxygen in thus -2
Uncontrolled cell growth is often associated with mutations in genes encoding proteins that promote cell division. These regulatory proteins are known as mitogens or growth factors.
- The consequence of a mutation that leads to rapid and uncontrolled cell growth is that the organism would begin to develop cancerous masses.
- Cancer is uncontrolled cell growth, which is caused by mutations in genes involved in the control of cell division.
- A growth factor is a molecule capable of inducing cellular growth and proliferation.
- A mitogen is a protein that induces a cell to begin mitosis (e.g., the Platelet-derived growth factor).
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Explanation:
Sex linked is a trait in which a gene is located on a sex chromosome. In humans, the term generally refers to traits that are influenced by genes on the X chromosome. This is because the X chromosome is large and contains many more genes than the smaller Y chromosome. In a sex-linked disease, it is usually males who are affected because they have a single copy of X chromosome that carries the mutation. In females, the effect of the mutation may be masked by the second healthy copy of the X chromosome.
A river of air called the jet stream runs along the troposphere just near the top. The troposphere starts at ground level and rises 11 km up which is equivalent to 7 miles or 36,000ft.
About 3/4 of the air in our atmosphere is in the troposphere and almost all weather happens here. Most of the clouds are found in the troposphere layer.
The jet stream is found just near the top of the troposphere zooming along at a speed of 400km/hr (250 miles per hour)
