I believe that would be natural selection
Waste is buried deep in the glacier but rides downhill and will eventually melt out. Beginning in 2007, removal of human waste via Clean Mountain Cans
Me and my friends think it is a hot plate
Answer:
The answer is B and D.
Explanation:
PKA ( Protein Kinase A) is an enzyme which becomes active with the presence of cAMP molecules in the cell and the cAMP molecules need to bind to R subunits to become active which happens at a ratio of 1:2.
The example given in the question states that the Ro sububit can bind to 8 molecules of cAMP rather than the conventional 2.
This means that the activation of the Ro subunits is harder than the activation of R subunit because of the requirement of higher cAMP concentrations.
B is correct, full activity of PKA with Ro subunits needs a higher concentration of cAMP.
Because Ro binds to eight units of cAMP, the dynamic range of activity of PKA with Ro is going to be over a wider range of cAMP concentration.
I hope this answer helps.
<h2><u>Full Question:</u></h2>
Which of the following would result in fraternal twins, who don't have identical DNA? A. Two sperm fertilizing a single egg B. One sperm fertilizing a single egg C. Two sperm fertilizing two different eggs that were released in the same cycle D. One sperm fertilizing a single egg that splits into two embryos
<h2><u>Answer</u>: </h2>
Fraternal twins do develop when two sperms do fertilize two different ova that are released at the same time of a menstrual cycle.
Option C
<h3><u>Explanation:</u></h3>
Twins are of two types - Monozygotic twins or identical twins, and Dizygotic twins or fraternal twins.
Fraternal twins develop rarely, when during the menstrual cycle of the would be mother, two ova are released by two ovaries. So, two sperms fertilize the two ova separately. These zygotes develop into two separate embryo in their own separate amniotic sac. Being developed from separate sperm and separate ovum, the twins have not much similar characteristics unlike identical twins.
Only the fraternal twins can have different genders, like one can be male and other female. Monozygotic twins are always of same gender.
