Cytokinesis is the last stage of mitosis where the parent cell fully splits into two identical daughter cells.
Answer:
The correct answer is B) a substrate will be unable to attach to the enzyme.
Explanation:
The enzyme binds to the substrate binds to proceed with the reaction. Enzyme attached to the active binding site of the substrate and form an enzyme-substrate complex to minimize the threshold of the reaction.
Inhibitor competes with the enzyme for the active binding site. Instead of the enzyme, the inhibitor binds with it and stops the reaction.
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b. False
Answer:
The given statement is False.
Predator-prey relationship is a biological relationship in which one organism kills and eat the other organism in an ecosystem. The organism who killed is termed as predator and the organism who is killed is termed as prey.
It helps in controlling the population size of prey, helps in slowing down the spread of the disease, and in the establishment of a healthier prey population by removing or killing the injured or sick animals.
Complete removal of the predators will lead to the overpopulation of their prey which is generally herbivores. The over-populated herds will eat more and more grass which will ultimately lead to the shortage of food.
So, the herds will starve to death.
Hence, we can conclude that the removal of predator has negative impacts on that predator’s prey species.
Answer:
False
Explanation:
Answer:
Explanation:
Nicotine is a type of stimulant that is chemically alkaloid. It works as the receptor agonist at the nicotinic acetylcholine receptor. It is a type of addictive chemical that increases the blood flow, heart rate and some biochemical reactions of the body. In the brain, it has stimulation as well as blocking effect. Medically, it is used for various purposes such as quitting smoking and some other.
Nicotine stimulates and then blocks cholinergic receptors in the brain, leading to both stimulating and relaxing effects.
Nicotine acts in the brain by first stimulating and then blocking cholinergic receptors. It first acts as a stimulant, increasing the release of acetylcholine, which causes excitatory effects in the brain. Eventually, the cholinergic receptors become desensitized and eventually blocked, leading to a reduction in acetylcholine's activity. This process helps explain why tobacco usage can both stimulate and relax users. When nicotine binds to these receptors, it activates them, leading to the release of dopamine and other neurotransmitters, producing pleasurable effects.
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