Bird skeletons are very delicate, and therefore, difficult to be preserved. The bones of the birds are soft. The small animals are very prone to physicochemical as well as biological decay. This is why the fossil record of bird is incomplete and well-preserved fossils of birds are rare to find, except at a few unusual sites.
Answer:
The sodium-potassium pump is an active transporter because it needs to move sodium and potassium ions against the concentration gradient.
Explanation:
You have to think of it as outside vs inside the cell.
Outside the cell, you have 5mM K and 150mM Na. Inside the cell, you have 100mM K and 10mM sodium. Without the transporter then the ions would go from greater concentration to lower concentration. Energy keeps the ions going from the way they would naturally happen.
Answer:
Describe two desert animals and the adaptation that help them survive?
Camel and Donkey
Explanation:
Both animals have two different types of stomach that enables them to store water for a very long time and makes them withstand drought
I think the correct answer from the choices listed above is option C. The statement that is correct about the cave and geyser would be that the <span>cave is formed when groundwater reacts with the limestone in rocks and the geyser is formed when groundwater gets heated. Hope this answers the question.</span>
