<u>Answer:</u>
<em>Biomagnifications largely affects the organisms at the highest trophic level.
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<u>Explanation:</u>
The increase in concentration of toxic chemicals while moving up in a food chain is called biomagnification. What starts out as a small concentration at the lowest trophic level turns out to become a <em>higher concentration at higher trophic levels. </em>
Thus it is the organisms at the highest trophic level that are the most affected. This accumulation occurs because the organisms have not evolved enough to posess mechanisms that <em>facilitate detoxification of various substances. </em>
Such substances are called novel substances and DDT is an example. Removal of substances like metals is also difficult. Thus a harmful chemical component travels up various trophic levels increasing in <em>concentration at each trophic level.
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Answer:
Option B
Explanation:
The pH scale is a way of determining a substance acidity, and it is logarithmic. As a result, each pH value is ten times more acidic than the next higher value. Therefore, pH 4 is ten times more acidic than pH 5 and 100 times (10*10) more acidic than pH 6.
Answer is D:) Just took the test
Answer:
DNA damage signaling processes are essential foe regulating the G0 transition within the cell cycle.
Explanation:
Cell cycle is a process which prepares a cell for division.Cell cycle has various phases G0 phase,G1 phase,S phase,G2 phase and M phase.Each phase is specialized for its particular function.
Every phases of a cell cycle is under tight regulation of various proteins and this regulation is very much important to maintain the normal level of principle constituents of a cell.
DNA damage is detected by G1 cyclin CDK protein which transit the cell containing the damaged DNA into the G0 phase or quiescent phase for repair and if the damage cannot be repaired then the cell containing damaged DNA is targeted for destruction by ubiquitin pathway.