Answer:
A
Explanation:
Because there are two DNA strands in the DNA molecule and they both rotate around each other in a helix formation. So two helixes = double helix.
Answer:
Spinal cord injuries are responsible for people not being able to move their bodies below a certain point. What determines how much of the body they can still move is the level of the spinal cord injury.
Explanation:
The central nervous system cannot communicate with the brain due to the spinal cord injury.
Answer:2
Explanation: Sperm cells in plants are found inside the pollen grain. When the pollen grains fall on the stigma, the pollen raptures and forms a pollen tube then the sperm cells pass through the pollen tube to the ovary.
Well Its basically destroying whatever habitat had formed there. Anything living on the surface of the grace would be dead. Bees would now longer visit since there is a cut in pollen count. The only organisms the yard might support well them
Answer:
Pineal gland
Explanation:
The suprachiasmatic nucleus is the paired nucleus made of about 1000 neurons each in the hypothalamus. The suprachiasmatic nucleus is involved in maintaining the endogenous clock or the internal clock.
The suprachiasmatic nucleus controls the circadian rhythm by controlling the amount of melatonin. The melatonin is produced by the pineal gland from the serotonin and tryptophan precursors. The hypothalamus thus controls the amount of the melatonin by regulating the pineal gland.
Thus, Pineal gland is the correct answer.
