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Answer:
D. in Animals the cell membrane pinches together
Explanation:
Answer:
ok :)
Explanation:
As we know, one parent has this medical condition gene, and the other does not. If both parents had it, it would most likely that all of their children will get it, but since one doesn't have it, the gene has a 50/50 chance on spreading to the offspring or not. It also has a lot to do with the grandparents as there was probably a 25% or 50% chance that the parent with sickle cell gene got it from their parents.
hope this helps hehe
Answer:
The correct answer is A and D
Explanation:
According to Russell's conception that lies in natural proton gradients. He states that Four billion years ago, alkaline fluids bubbled to produce mildly acidic oceans (As CO2 levels were about a thousand times higher, and it reacts with H2O to form carbonic acid, rendering the oceans mildly acidic). Acidity is just a measure of proton concentration, higher in the oceans than in vent fluids. This difference has given rise to a natural proton gradient across the vent membranes that had the same polarity (outside positive) which is similar to the electrochemical potential as modern cells have. This might be the reason that last universal common ancestors of all the three domains have evolved proton pumps.