The answer to this is: the light-dependent reactions involving photosynthesis I and II
Osteoporosis affects the the skeleton whereby the bones become brittle and fragile as a result of deficiency in vital nutrients such as calcium and vitamin D
The process of natural selection is described in the cartoon.
Explanation:
Natural selection is the mechanism by which an organism survive and evolve.
It is the process in which organism have better adaptation to its environment and live to reproduce organisms with useful traits which are passed on to their offsprings.
In the given cartoon it is observed that green beatles fall prey to the crows as a result their survival chances are minimal. Over the generations they are eaten by crows and eventually their brown counterparts are in majority. This is because the brown colour beatles are safe from the prey, they pass on this trait to their offspring and remains safe and more in population.
The brown colouration in beatles is the Darwinian trait of survival of the fittest for beatles.
The variation in population, mutation or genetic drift causes natural selection.
The one with better adaptation survives and reproduce more viable offspring in the population.
Answer:
At a level in the spinal cord
Explanation:
The gate theory was elaborated in 1965 by P.D. Wall and r. Melzack, to explain the influence of tactile skin stimulation on pain relief. It essentially admits that there exists in the medullar posterior horns (located behind the central canal of the spinal cord) a gate-acting neural mechanism that can control the passage of nerve impulses transmitted from the peripheral fibers to the CNS through the medulla.
The gate regulates the influx of nociceptive impulses even before a perception of pain is created. The variation in the passage of action potentials (nociceptive) that the gate produces is determined by the activity of the thick (A-alpha and A-beta) and thin (A-delta and C) fibers, as well as cognitive influences.
Poultry products are a likely source of infection by Salmonella enterica
which causes typhoid.
Most farm animals such as pigs, cattle and poultry have been found to be
infected with Salmonella enterica as a result of their contact and exposure
to a dirty environment.
This is why it is advisable to apply much heat on poultry products such as
eggs to kill the micro-organism.
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