Answer:
It doesnot have a nucleus to increase the surface area
Explanation:
Red blood cells carry oxygen from our lungs to the rest of our bodies .Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.
Answer:SECONDARY SUCCESSION Explanation:Secondary succession can happen after primary succession or independently of primary succession.An example of Secondary Succession by stages:
1. An area of growth.
2. A disturbance, such as a fire, starts.
3. The fire destroys the vegetation.
4. The fire leaves behind empty, but not destroyed soil.
5. Grasses and other herbaceous plants grow back first.
6. Small bushes and trees begin to colonize the public area.
7. Fast-growing evergreen trees and bamboo trees develop to their fullest, while shade-tolerant trees develop in the understory.
8. The short-lived and shade-intolerant evergreen trees die as the larger deciduous trees overtop them. The ecosystem is now back to a similar state to where it began.
(Hope this helps)
Answer:
1. Binding of insulin to the alpha subunit of the insulin receptor
2. Activation of insulin receptor tyrosine kinase
3. Phosphorylation of IRS proteins
4. Activation of PIP3-dependent protein kinase B (PDK1)
5. Phosphorylation of phosphinositide 3-kinase (PI-3K)
6. Conversion of PIP2 to PIP3
7. Activation of Akt
8. Glut4 receptors transported to cell membrane
His discoveries on the islands were paramount to the development of his Theory of Evolution by Natural Selection.
On the islands, Charles Darwin discovered several species of finches.
Thanks to his close observations, he discovered that the different species of finches varied from island to island.