Answer:
a catalyst
Explanation:
Catalyst is a substance that influences the rate of reaction without being consumed in the reaction. They increase the rate of reaction by decreasing the activation energy of the reaction. In biological system, enzymes are referred to as biological catalyst or biocatalyst. They are generally protein in nature and are very specific for their substrate. They also increases the rate of biological reaction by forming enzyme-substrate complex.
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The tooth surfaces that face the tongue are known as lingual surfaces.
Answer:SECONDARY SUCCESSION Explanation:Secondary succession can happen after primary succession or independently of primary succession.An example of Secondary Succession by stages:
1. An area of growth.
2. A disturbance, such as a fire, starts.
3. The fire destroys the vegetation.
4. The fire leaves behind empty, but not destroyed soil.
5. Grasses and other herbaceous plants grow back first.
6. Small bushes and trees begin to colonize the public area.
7. Fast-growing evergreen trees and bamboo trees develop to their fullest, while shade-tolerant trees develop in the understory.
8. The short-lived and shade-intolerant evergreen trees die as the larger deciduous trees overtop them. The ecosystem is now back to a similar state to where it began.
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Answer:
B
Explanation:
Any drug sold in the supermarkets, convenient stores etc without prescriptions are called OTC-medication or over the counter drugs.
They are the group of drugs commonly abused by young adults. Recommendation by National Institute on Drug Abuse is that , any use of drug not related to medical purpose, but for mind-altering effects or arousal is regarded as an abuse. No doubt these drugs are obtained over the counter because they are very easy to get, very cheap and legalized by law to buy, thus easily accessible.
They drugs are high in contents which produces psychoactive effects when imbibed in over dose, and some may have damaging effects on the kidney and liver.
Other effects on the body physiology includes headaches, vomiting, nausea, seizures, tremors. etc.
