Answer:
The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume.
No problem
so
Chain 1. Sun -> Tomato plant -> Tomato -> You
The sun provides energy to the tomato plant which is used to grow a tomato which is eaten by you.
Chain 2. Sun -> Wheat -> Flour -> Bun -> You
The wheat uses the sun's energy to grow when the wheat is mature it is used to produce flour which is used to bake the buns for the hamburger which is then eaten by you again.
Chain 3. Sun -> Lettuce -> You
The lettuce grows and uses the sun's energy to live it is then eaten by you in the hamburger.
Hope this helps :).
1. The population is under selection pressure from predators
<span>2. Hey now, no population is ever at H-W equilibrium: </span>
<span>mutations happen </span>
<span>immigration and emigration can occur </span>
<span>the population is not huge, which means that genetic drift can happen </span>
<span>mating is not completely random -- a rat is more likely to mate with someone local than with someone living in Paris, France. </span>
<span>b) The small rats will be selected for (assuming there are predators in this ecosystem that are less likely to look in bushes, and further assuming that the small rats do not have reduced fertility by dint of being small) </span>
<span>This is "directional selection" </span>
<span>c) I would expect the "smallness" allele frequency to increase in this population over time, and the "normal size" allele frequency to decrease.</span>
A Kilocalorie is a measure of energy in food.
Answer:
A. True
Explanation:
Allolactose is an example of an inducer, a small molecule that triggers expression of a gene or operon. The lac operon is considered an inducible operon because it is usually turned off (repressed), but can be turned on in the presence of the inducer allolactose.