The 2nd and 4th answer choices sound the best to me. I personally would go for the 2nd one, explaining that the fossils of fish K and fish R and Y are similar. If you get the question wrong, I am VERY sorry. :(
Glucagon triggers your liver to convert stored glucose (glycogen) into a usable form and then release it into your bloodstream.
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What is glucagon?</h3>
The pancreatic alpha cells that produce glucagon are peptide hormones. It is thought to be the body's primary catabolic hormone since it increases blood levels of glucose and fatty acids. Additionally, it is prescribed as medicine to treat a variety of medical ailments.
When the blood glucose level is too low, the pancreas produces glucagon. Glycogenolysis—the process by which the liver releases glucose into the bloodstream—is triggered by glucagon and occurs in the liver. On the other hand, high blood sugar levels encourage the production of insulin. Insulin-dependent tissues can absorb and utilize glucose with the help of insulin. As a result, the feedback mechanism that maintains steady blood glucose levels includes both glucagon and insulin. Energy expenditure is increased by glucagon, which is higher during stressful situations. The secretin family of hormones includes glucagon.
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Answer:
Letter D
Explanation:
The process that initiates the ripening of some fruits is initially caused by the elimination of the gas ethylene, which is one of plants hormones that can act as growth regulators. Ethylene is the responsible to activate a transduction pathway after it goes on the membrane of the cells and reaches its receptors, causing the transcription of ethylene responsive genes, and therefore ripening. Loss-of-function mutations on those receptors of the ethylene molecule will end the activation of transcription of those responsive genes, because without the functioning receptor, ethylene cannot interact, so the ripening won't happen.
Answer:
In meiosis I, crossing over during prophase and independent assortment during anaphase creates sets of chromosomes with new combinations of alleles. Genetic variation is also introduced by random fertilization of the gametes produced by meiosis.
Explanation:
hope this helps :)