Answer:
(a) 21% of the human genome is comprised of G.
(b) 29% of the human genome is comprised of T.
(c) 29% of the human genome is comprised of A.
Explanation:
According to Chargaff's rule, a DNA molecule has the same amount of pyrimidines (T and C) as purines (A and G), and G pairs with C and A pairs with T.
If 21% of the genome contains C, then 21% also contains G.
Therefore 21% + 21% = 42% of the genome is comprised of G+C.
The other 58% is comprised of A+T, and because they pair with each other, 29% will correspond to A and 29% will correspond to T,
Answer:
a. Diameter of afferent astride is bigger than efferent arteriole to generate force for efficient filtration
b. Urine is slightly thicker in summer than in winter to reduce water loss from the body
c. Always vasopressin is not secreted when a person drinks sufficient water
d. ESRD stands for End stage renal disease
Explanation:
a. While transferring blood from afferent astride to efferent arteriole blood gets filtered. Filtration is efficient when the blood flows with force which is generated when blood flows from large arteriole to the small arteriole. Hence the diameter of afferent astride is bigger than efferent arteriole.
b. Urine is slightly thicker in summer than in winter to reduce water loss from the body. In summer water is lost in the form of sweat as well. Hence, urine gets concentrated to compensate for the lost body fluid.
c. Always vasopressin is not secreted when a person drinks sufficient water. The osmoregulation is maintained externally.
d. ESRD stands for End stage renal disease
Answer: B. A combination of DNA and proteins in the nucleus of a cell
In Biology, a stimulus is a change in an organism's surroundings that causes the organism to change its behavior in order to make the environment more satisfactory.
Answer:
C) The smaller population will be more affected than will the larger population, because the smaller population has less genetic variation than the larger population has.
Explanation:
Genetic variations are present in the natural populations. Some of the genetic traits become adaptive under the changed environmental conditions and allow the individuals carrying them to survive and reproduce. In this way, the genetic variations help to maintain a population.
Therefore, a larger population of a squirrel species with more genetic variations will have less intense impacts of a disturbance/natural calamity and/disease. On the other hand, a smaller population of the same species with a lesser number of squirrels has fewer genetic variations. This population is more likely to be affected in a negative way by a disturbance such as pathogen.