DNA Mutation is caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Thus, the correct answer is option D.
1.DNA Mutations are caused by environmental factors known as mutagens.
2.Types of DNA mutagens include radiation, chemicals, and infectious agents.
3.DNA Mutations may be spontaneous in nature.
Answer:
3% of the earth's water is fresh. 2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost. 0.5% of the earth's water is available fresh water
Explanation:
please give brainliest
there are 4 chromosomes in the sex cells of each fly
Answer: <u>Option B; 100</u>
Explanation: If the cell is placed in a solution with 75 ppm calcium ions, then the cell will die, because water will enter the cells and they can burst. 75 ppm is quite a hypotonic solution for survival of bacterial cells. Same is the case will 125 ppm, here the cells will die because of dehydration. The increased solute concentration will make the bacterial cells to loose water and this principle is used in preservation.
100 ppm will provide the most stable environment because the water movement will occur at a same rate and the processes of the cell can proceed at required rate.
Imprinting is the answer.