Answer:
The correct answer would be b. the environment.
Due to movement of tectonic plates the organisms would experience different environment. For example, different habitat, different food source et cetera.
As an adaptation to the changing environment different organisms would evolve in different species.
For example, in Galapagos island fiches had developed different sizes and shapes of beaks as a result of adaptation towards different environment.
They could be white or black. Black should be dominant, I guess, so 75% of offspring should be black.
a combined transmitter and receiver called a transducer sends a sound pulse straight down into the water and the pulse moves through the water and bouces off the ocean bottom so that the transducer is able to pickup the reflected sound
Answer: CRH - ACTH - glucocorticoid
Answer :Erwin Chargaff a Biochemist
Explanation:
He formulated the base paring of double helix of DNA. He reasoned that since the percentage of four DNA bases are of this proportions in human;
Adenine=30.9% and Thymine =29.4%;
Guanine=19.9% and Cytosine =19.8%
Then, the amount of adenine will always be equal to thymine,
And the amount of Guanine equals to cytosine based on this percentages of distribution.
(Adenine and Guanine are large, molecule of Purines, while thymine and Cytosine are Pyrimidine)
He concluded (although scientist believed, he did not explicitly stated this) that this should be the base paring patterns in DNA molecule. This is the first Chargaff Rule.
His second rule is that the DNA composition, in the relative amount of the four bases Adenine, Thymine, Cytosine and Guanine varies in proportion from one organisms to another. And this is the basis of molecular diversity.
