The mammalian diving reflex refers to an adaptive characteristic that permits the mammals to stay underwater for an elongated duration of time. It is more noticeable in aquatic mammals, however, is weaker in mammals like humans.
This reflex is initiated when the face encounters with cold water. The initial influence is bradycardia in which the rate of the heart slows down up to 25 percent. There is peripheral vasoconstriction that comprises a reduction in the supply of blood to the arms and legs, and the supply upsurges towards the brain.
It can be stated that in humans, it is not an evolutionary vestige, but yes it is not much amended as aquatic mammals due to their terrestrial habitat.
Alleles can be either dominant or recessive.
Dominant alleles show their effect even if the individual only has one copy of the genes, For example, the allele for brown eyes is dominant, therefore you only need one copy of the 'brown eye' allele to have brown eyes ;although, with two copies you will still have brown eyes.
If both alleles are dominant, it is called co-dominance. The resulting characteristic is due to both alleles being expressed equally. An example of this is the blood group AB which is the result of co-dominance of the A and B dominant alleles.
Recessive alleles only show their effect if the individual has two copies of the allele. For example, the allele for blue eyes is recessive, therefore to have blue eyes you need to have two copies of the 'blue eye' allele.
Illustration showing the inheritance of dominant and recessive alleles for eye colour.
Answer:
3/8
Explanation:
Martha has a widow's peak (dominant trait) and attached earlobes (recessive trait).
Martha's dad had a straight hairline (ww) and unattached earlobes (Ee, because she has the recessive alleles ee and both parents give us one allele).
This tells you that martha has a mother with at least one of both alleles dominant for widow peak and at least one recesive allele of attached earlobes
So, martha's alleles are: Ww and ee.
If she marries a man that is heterozygous for both traits (Ww and Ee) the probabilitys are
Ww Ee x Ww ee: WWEe, WwEe, wWee, and wwee
Answer:
Explanation:
The objective is to conclude if the statements are true or false based on facts.
1)
True
2) 
False
This is because their ancestor is a Chordate who doesn't have a vertebral column but a notochord.
3) True
4) 
False
This is because the bass is a fish that possess some characteristics traits related to an amphibian (turtle) as compared to a mammal(leopard).
5) 
False
The taxa of turtles share a more common ancestor with frogs compared to bass.
6) 
False
The common distant ancestor for leopards and lancelets is known as Chordates
Are their any answer choices? If this is referring to the Evolutionary basis of Charles Darwin’s work on Beaks than limited resources would result in a change or a development of new anatomical features such as a change in beaks or complete extinction of species as a whole
