C. How the organism is related to others
Explanation:
From a single fossil, a scientist can learn how the organism is related to others. Fossils are the preserved remains of organisms that are usually found in rocks.
- Organisms must posses certain characteristics to ensure their preservation as fossils.
- Most organisms that are preserved usually have hard parts.
- Some climatic influence can also arrest decay and provide a platform organisms to be preserved wholly.
- Fossils are used for relative dating of events in nature.
- They can also be used to determine how an organism is related to another.
- This is called phylogeny. It is the study of evolution and how organisms relates to one another.
- Fossils are very good and useful phylogenetic tools.
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Answer:
Explanation:
Studies indicate that mining is one of the most perilous occupation in the world in terms of injuries and fatalities, and also due to the long term health effects associated with it. Long term effects include respiratory problems such as pneumoconiosis, asbestosis, and silicosis.
Answer:
Measure your heart rate while lying down, while sitting down, and while standing. How does your heart rate change with body position?
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:
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