The best answer is D.
Carbohydrates get rapidly digested and are quickly converted to glucose . Once glucose levels in the blood rise, insulin that is produced by the pancreas begins to remove excess glucose from the blood and stimulates the liver to turn it into a type of starch called glycogen, which is stored in the liver and muscles.
However the body can only store a limited amount of glycogen so the excess glucose is stored as body fat (adipose tissue). This is the process of putting on weight.
A sedimentary rock can become an igneous rock by melting and solidification.
Answer: The sun
Explanation: Primary producers obtain their energy via the sun through the process of photosynthesis.
Nutrients cross the membrane wall with the help of protein channels.
The human activity that creates the least threat to global stability is : Reuse of Plastic bags.
Plastic bag need a lot of time to be degraded in the soil which will create a threat to the environment. Reusing plastic bag will reduce this threat.
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