The epidural space surrounding the spinal cord differs from
the surrounding of the brain is because the epidural space is set to be a
separation of the dura mater that surrounds the spinal cord and the spinal
dura, in which, allows separation because of its component of having fat and
blood vessels.
Well maybe that species evolved over time to get faster and be more durable because of the need to run away from lions and other prey.
It's erosion. Hope it helps
Answer and Explanation:
Cyclins and cyclin-dependent protein kinases (CDPKs, cell proteins) also function to control the cell cycle. A group of cyclins: the G1 cyclins, are synthesized during G1 phase and function to activate CDPKs which initiate DNA synthesis at the G1/S checkpoint. The cell fails to progress to S phase if there is no sufficient synthesis of G1 cyclins. After a cell passes through this point, the G1 cyclins are degraded, allowing for another group of cyclins: the M cyclins (mitotic cyclins) to be synthesized. M cyclins activate a second group of CDPKs which allow the cell to pass the G2/M control point and into mitosis.
In the G1/s check point, entrance into the S phase is blocked if the genome is damaged. In the G2/M check point, entrance into the M phase is halted if the DNA replication is incomplete. In the M phase, anaphase blocked if chromatids are not properly assembled.
Im pretty sure your answer is b.
