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
Answer: b dead organisms And waste are recycled throughout the tropic levels.
Explanation:
A stationary front is the least likely to be associated with rainfall.
Photorespiration limits casualty products of light reactions
that build up in the absence of the Calvin cycle. In many plants,
photorespiration is a problem because on a hot, dry day it can drain as much as
50% of the carbon fixed by the Calvin cycle. The closing of stomata reduces access to CO2
and causes O2 to build up. These conditions favor a seemingly not useful process
called photorespiration. In most plants
(C3 plants), initial fixation of CO2, via rubisco, forms a three-carbon
compound. In photorespiration, rubisco
adds O2 instead of CO2 in the Calvin cycle. Photorespiration eats up O2 and
organic fuel and releases CO2 without producing ATP or sugar. Photorespiration
can evolve relic because rubisco first evolved at a time when the atmosphere
had far less O2 and more CO2.
