Explanation:
By using sound absorbing substances we can reduce the echoes.
as we seen in the cinema hall...lol
Hearing gives an animal advantages such as being able to listen out for predators, so the animal can run away. The hearing can aid the animal when hunting for other animals, because it can stay still and wait for the right timing to attack, etc.
4. Collect and measure the amount of rain in March and in April
Explanation - Rainfall can be measured by instruments like rain gauge. But in case rain gauge is not available then the rain water can be collected in a vessel having funnel at the top.
Measuring the amount of water falling each day in the month of march and april would give the idea about which month has more rainfall. The measurement might not be accurate but it gives a brief idea about how much centimeter of rain is occurring in both the months.
All the steps of GPCR signaling would be prevented in the presence of a beta-blocker drug.
<h3>What is Beta-blocker?</h3>
Beta-blocker may be defined as a kind of medication that chokes the activity of substances, such as adrenaline, on nerve cells and provokes blood vessels to relax and dilate.
Adrenergic receptors choke the attachment of catecholamine that is epinephrine to the G-protein. G-protein activates adenylyl cyclase which in turn activates protein kinase A.
But when the beta-blocker drug is subjected to this pathway, it blocks the attachment of the hormone to their receptors, hence none of the pathway or steps would be carried forward. This is because signaling is not initiated.
Therefore, all the steps of GPCR signaling would be prevented in the presence of a beta-blocker drug.
To learn more about GPCR signaling, refer to the link:
brainly.com/question/9882354
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Are you referring to vocal cords?
