Answer:
Sympatric speciation
Explanation:
There may be more than one answer here, but concerning speciation, sympatric speciation can't occur because of the geographic isolation (must be living in the same environment for this to occur).
That would be the kidneys.No kidneys= no urinary tract. Hope this helps!
The ciliary muscles behind the iris shape the lens by pulling the choroid up and relaxing the suspensory ligaments. The ciliary muscle changes the shape of the lens within the eye, not the size of the pupil which is carried out by the spincter pipillae muscle and dilator pupillae. When the ciliary muscle is relaxed, the choroid acts like a spring pulling on the lens via the zonule fibers causing the lens to flatten, and when the muscle contracts, it stretches the choroid, releasing the tension on the lens and thus they become thicker.
Answer:
A
Explanation:
in DNA there is complementary base pairing which is that Adenine always pairs with Thymine and Cytosine always pairs with Guanine. therefore, if there is a certain amount of adenine in the DNA it must have the same amount of its complementary base, thymine.
the answer cannot be b as cytosine and thymine are not complementary base pairs. although b can coincidently be correct- that the amount of cytosine and thymine are equal- the question states that it must always be true. the answer cannot be c as ribose is found in RNA and deoxribose is found in DNA.
The correct option is D.
Endosymbiosis theory postulates that eukaryotic cells evolved from prokaryotic cells. Scientists have discovered that there are many similarities between prokaryotic cells and the organelles in eukaryotic cells.