Answer:
It is an acute effect of a toxin in the lake
Explanation:
The myelin sheath that covers many cns axons is formed by oligodendrocytes.
Oligodendrocytes are type of neuroglia (non-neural cells found in central nervous system) with protective, trophic and supportive role. Their function is to insulate axons (with myelin sheath), in the central nervous system (CNS) which is, equivalent to the function performed by Schwann cells in the peripheral nervous system (PNS).
The uniqueness of individual offspring for many animals and plants is the result of a process called Meiosis.
During meiosis , the number of chromosomes in parent cell are reduced by half and produces four gamete cells.
Later
on, these chromosomes are mixed into the new offspring, causing it
carried out some characteristic from its parents and became a new unique
individual.
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They have different types of cell walls and cell membranes.
Answer:
The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet. It was proposed by Alfred Wegener.
Explanation:
