TRANSDUCTION. This refers to the stimulus being converted into an action potential which is then transmitted in the axons going to the central nervous system. This usually starts at the receptor cell. The stimulus change the electrical potential across the cell membrane. This will result in depolarization of the membrane which allow the action potential to be transmitted towards the brain where the electrical impulse is integrated. This usually happens in sensory cells in the body such as vestibular apparatus, olfactory cells, the retina and even the nerve endings alls over our body.
Pentaradial and Bilateral
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I believe you're looking for "invasive species"
Answer:
An increase in human population growth means there is an increased need for natural resources to supply the basic needs of the population.
Explanation:
I recall that Professor Kwang had observed amoebas that had cannibalized bacteria cells. The bacteria were slaughtering the amoebas, but somehow some survived. This particular group of amoebas contained bacteria that thrived inside it. Hence the name, endosymbiosis. However, this lucky group and it's offspring could not survive without bacteria.