Answer:
Option-D
Explanation:
A reflex arc is the neuron pathway which is involved in producing the response to reflex action or the immediate response.
The reflex arc pathway involves the sensory neurons, interneurons and the motor neurons.
Although the reflex arc pathway involves the brain later but in producing response the brain is not involved.
The stimuli are perceived by the spinal cord but not the brain therefore the selected option is correct.
Thus, option-D is correct.
Answer:
No, because cell division is expected to decrease not only the net amount of cyclin molecules in daughter cells but also the volume of these daughter cells compared to the original parent cell, and therefore the concentration should be nearly equal.
Explanation:
When a cell divides to produce two daughter cells, the cell components including its previously duplicated genetic material (DNA), organelles, signaling molecules, fatty acids (lipids), proteins, etc., are distributed into daughter cells. These daughter cells have a smaller volume compared to the original parent cell. In consequence, the concentration of cellular components (including cyclin proteins) should be similar between parent cell and daughter cells.
Answer:
A.black ofc....... ......
They protect the skin from attacks by predators, parasites and other injuries.
