Answer:
Forest plantations are forest that stands established by planting and/or seeding in the process of afforestation or reforestation.
Explanation:
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The process in which the plant's prepare there food in the presence of light is called photosynthesis. the respiration in which the breake down of sugars into a form which cell can use as a energy is called cellular respiration.
Answer:
Telomeres cap and protect the ends of chromosomes from degradation and illegitimate recombination. ... Abolition of telomerase activity in such cells nevertheless results in telomere shortening, a process that eventually destabilizes the ends of chromosomes, leading to genomic instability and cell growth arrest or death.
Answer:
The action potential in an alpha motor neuron is propagated by saltatory conduction that, when it reaches the terminal bouton, causes a Ca2+ influx which leads to the fusing of acetylcholine-containing synaptic vesicles with the plasma membrane, and the release of said neurotransmitter in the neuromuscular junction. Acetylcholine activates the nicotinic receptors that open the sodium / potassium channel and causes the sarcolemma to reverse its polarity.
Depolarization will reach the sarcoplasmic reticulum and thanks to the T Tubules the potential for intracellular release of accumulated Ca2+ will be approximated. To make the concentration of this ion sufficient to produce the contraction there will also be an extracellular calcium entry through the Ca2+ channels. At this moment, the myosin-actin junction points are free and when binding occurs the contraction. When the moment of relaxation arrives, the links must be broken so that the muscle is not contracted. These bonds are broken thanks to the action of myosin as ATP, which breaks the bond by ATP hydrolysis. This process will be favored only when the Ca2+ decrease.
