These lines (there is four of them) are residuals of the fusion of the five sacrum vertebrae that are fused. These "vertebrae" or segments present a characteristics, being the first of them very similar to a lumbar vertebra, large, and the other vertebrae are<span> progressively smaller and flattened. They also present a curved shape being anteriorly concave.</span>
Answer: Decreases
Explanation:
The amount of sodium in the blood will increase as the main function of the negative feedback is to maintain the homeostasis inside the body.
If blood pressure is too high, then heart rate decreases because of this the blood vessels increases in the diameter and the kidney retains less water.
These changes will return the blood pressure to be normal. The same process gets reversed when the blood pressure decreases.
An energy pyramid is always related to the organisms food web. A increase in no of tropic levels could make it complex. Also the reason for only 4 or 5 is to make it simple to understand.
D oxygen there was no free oxygen on the earth
Answer:
<u>Red blood cell in humans -</u> it has no nucleus. Hence it offers the cell to carry more haemoglobin.
- they are disc shaped allowing them to pass through narrow capillaries.
<u>Root hair cells in plants-</u> they have a large cytoplasm which enables them to take water from the soil.
<u>White Blood Cells in humans -</u> they have lobed nucleus and so can change their shape to pass through narrow capillaries.
- <em><u>HOPE IT HELPS...</u></em>
