Answer:
In the course of evolution mammals are the animals which are evolved recently as compared to other groups such as fish, amphibians, or reptiles.
In addition, fur or hairs on body, mammary glands, middle ear bone, warm-blood, et cetera are the characteristics of mammals.
These characteristics were evolved during the course of evolution; they were not present in ancestral organisms.
However, tail, gill pouches, et cetera are characteristics of our ancestral groups. Thus, characters can be sometimes observed in mammals.
But mammals characteristics can not be observed in organisms which were evolved before mammals such as fishes, amphibians, reptiles, et cetera.
Answer:
Sutton and Boveri published independent papers proposing what we now call the chromosome theory of inheritance.
<span>1.artifical selection
2.geographical distributio
3.embryology
4.fossil record
5.DNA
6.homologous structures
7.watching natural selection happen</span>
A. a breeze
A breeze is caused by unequal heating and cooling of adjoining areas of the surface of the Earth. It is strongest during the day in warm, dry weather. More intense solar radiation leads to stronger breeze. It can be countered or augmented by winds moving through pressure systems.
The right atrium receives all of the systemic venous return Beneath the diaphragm, systemic venous flow enters the inferior vena cava, that is, blood from the abdominal and pelvic regions and the lower limbs.