The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the pampiniform plexus of veins. The pampiniform plexus helps to regulate testicular temperature, allowing sperm maturation. It surrounds the testicular arteries and works as a countercurrent heat-exchanger system to cool the arterial blood before entering the testes. This is because the sperms can not develop if the testis is at body temperature.
Prophase- <span>chromosomes become visible as paired chromatids and the nuclear envelope disappears.
metaphase- </span><span>chromosomes become attached to the spindle fibers.
anaphase- </span><span>chromosomes move away from one another to opposite poles of the spindle.
telophase- </span><span>the final phase of cell division in which chromatids, or chromosomes, move to opposite ends of the cell and two nuclei are formed.</span>
The answer is A. The main driver of the convention in atmospheric
circulation is the suns energy. When the sun heats the earth, the atmosphere directly below the sun gets heated more
and faster compared to other regions causing an area of low pressure. This hot
air mass rises and is replaced by cooler air masses (from high-pressure regions)
from neighboring regions. This, essentially,
causes winds and air currents.
Answer:
GGATCGA
Explanation:
Adenine goes with thymine and Cytosine e goes with guanine.
Basically A is with T; C is with G
