Based on the model of eukaryotic cell cycle regulation shown in the figure, which of the following best describes the effect of a drug that blocks the production of the mitotic cyclin? А
The cell cycle would proceed uncontrollably, and the cell would become cancerous.
B
The G1 cyclin would functionally replace mitotic cyclin, and the cell would continue dividing normally.
с
DNA synthesis would be prevented, and the cell would stop dividing.
D
The cell would be prevented from entering mitosis, and the cell would stop dividing.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

answer: b

coz red blood cells marrow and circulates the body for 120 days.