<span>The effect of insecticides will result in prolonged muscle contraction.</span> <span>Acetylcholinesterases are the enzymes that catalyze the breakdown of acetylcholine (Ach) in the synaptic cleft. This normally occurs, after the Ach achieves its effects on its receptors. On the other hand, acetylcholinesterase inhibitors inhibits the acetylcholinesterase enzyme thereby increasing the level and duration of action of the neurotransmitter ACh. Acetylcholinesterase inhibitors are used as insecticides.</span>
The answer is 'Cambrian' explosion. This took place approximately 541 million years ago. 'Explosion' refers to the evolution of a large range of new major animal phyla. Scientists know this by the large number of diverse fossils from this period. Prior to this period, organisms were single-celled, but over the Cambrian Explosion, lasting about 80 million years, life forms diversified rapidly to resemble the life forms existing today.
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Answer is 3. Hope this helps!
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Glycoprotein Cell Receptors, but you can probably just put proteins
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I think the answer would be D,I'm not really sure though,hope I'm right,sorry if I,m not :)
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