Answer:
Myelin sheath increases the speed of electrical impulse along the nerve cells.
Explanation:
Myelin sheath is an insulting layer of proteins and fatty acids that are present around the nerves of brain and spinal cord.
Myelin sheath increases the speed of conduction of nerve impulse from one nerve cell to another cell. Myelin sheath is formed by the concentric wrapping of schwann cells around the axon. This sheath decreases axonal membrane capacitance and increases the conduction of nerve impulse.
The correct answer is: [B]: "electrolytes" .
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<span>I believe the answer is,
High systolic, because when the heart pumps, the pressure inside the aorta would be greatest, causing the weak spot to rupture outward.
This indicates high blood pressure that causes rupture of the aorta or aorta dissection.</span>
Answer:
The options needed to complete the question are
A. adaptive radiation.
B. alloploidy.
C. autoploidy.
D. hybridization.
The RIGHT ANSWER IS A.
A. adaptive radiation.
Explanation:
Adaptive radiation
It's a form of evolutionary biology. In Adaptive radiation there is a relatively fast evolution of many species from a single common ancestor I.e a specie changes rapidly from an ancestral species into a different or groups of new forms.
It mostly occurs when an organism lives a new area and different traits affect its survival. E.g development of mammals after the extinction of dinosaurs.
Answer:
a) Distance
b) Direction
c) Displacement
Explanation:
Speed is the distance covered in per unit time by an object or person. It is how fast an item is moving. speed does not have a direction. It is the ratio of distance covered and time taken.
Example: A car covered 100 km in 1 hour.
Its speed will be 200 km/h.
On the other hand, velocity has direction as well as magnitude in it so it is a vector quantity. Velocity is the ratio of displacement and time.
Example: A car moved 100 km in 1 hour southwards.
Its velocity will be 100 km/h (towards south).
Thus, the correct answer is :
a) Distance
b) Direction
c) Displacement