Answer:
b. genes have no difficulty crossing the species barrier.
Explanation:
DNA is a universal molecule, by now it is known that has the same structure in pigs, birds, an other living things.
When a gene is transfer to other species, the most difficult action is that the living thing that is the receptor, can adopt this new sequence of DNA and reproduce it again as part of the new DNA.
In some examples like in pigs and humans, we are so closely that you can use some DNA pigs or tissues to replace in humans when is neccesary in a surgery.
Answer:
A. It sank below the ethanol and distilled water.
Explanation:
The correct answer is B. This question relates to using a punnet square to determine the genotypes of the offspring. Two heterozygous parents expressing a polka-dot tale must have genotype Pp each.
Using a punnet square, this will produce 4 possible genotypes in equal probability:
PP - polka dot
Pp - polka dot
Pp - polka dot
pp - solid tale
Therefore there is a 75% change of getting polka dots in the offspring, and a 25% chance of solid tale.
A. is an incorrect answer because only 50% of offspring will be type Pp, another 25% will be expressing double dominant alleles for P as PP, which will still express polka dots.
Answer:
1- study the fossils of ancient land vertebrates
Explanation:
Some scientists concluded after performing a number of experiments that the legs of modern land vertebrates evolved from the fins of ancient fish. With the passage of time evolution occurs within the body of organisms. These changes occurs due to the surrounding environmental condition of that organism. When the organisms live in water, fins were present but when they go to the land so these fins change into legs. This type of evidence is provided by the scientist after studying the remains of ancient land vertebrates.
When corticosteroid is released directly into the blood stream it causes Increase in serum cholesterol and helps in Sodium and fluid retention, also increases blood sugar level and decrease thyroid hormone levels.
Corticosteroid when released directly into the bloodstream it helps body respond to stress or danger, increase the body's metabolism of glucose and control blood pressure.
Corticosteroids are mainly used to reduce inflammation and suppress the immune system. Corticosteroids modify the functions of epidermal and dermal cells and of leukocytes participating in proliferative and inflammatory skin diseases. After passage through the cell membrane corticosteroids react with receptor proteins in the cytoplasm to form a steroid-receptor complex.
To learn more about Corticosteroid , here
brainly.com/question/4260159
#SPJ4
