Answer:
The two forms interbreed and their offspring survive and reproduce well.
Explanation:
When talking about classification of species, one of the first features observed is the species fitness, which describes the reproductive success or their ability to leave to their successive generations the most copies of their genotype. When different species that were recently divided into 2, by geographic isolation, for instance, usually there is no genetic compatibility, and if its possible to produce offspring, there might be some development issues like infertility.
Answer:
D
Explanation:
The only way for giraffes to evolve over time towards having long necks would be to have genetic differences that were gradually favored over time. As in, the giraffes that were genetically disposed to have necks just a bit longer eventually survived longer, because they could eat high leaves, while those with short necks died, and the long-necked giraffes reproduced more, which increased the allele frequencies of long necks in the species over time.
Never, never say A or B!! This is known as Lamarck's theory of inheritance of acquired characteristics, and it's simply wrong.
C is wrong, because the mutation must occur in the original zygote.
The blood flows through hepatic portal vein traveling to the liver, then makes it another artery which is posterior vena cava making it to the heart. It makes itself afterward to the pulmonary artery where it reaches the lungs, going back to the heart via the pulmonary vein. Eventually, it goes to the kidney through different parts such as the aortic arch, dorsal aorta and the renal artery.
Answer:
I believe it interacts with the lymphatic system (because it creates lymphocytes) and the circulatory system (because it creates red blood cells).