C they increase activity of a number of neurotransmitters
Answer:
Left amount of Polonium-210 after 115 days will be 4.5927 microgram
Explanation:
We have given initial mass of Polonium-210 
Decay rate x= 0.502% = 0.00502
Time t = 115 days
We have to find the left amount of Polonium -210 after 115 days
We know that left amount is given by
So left amount of Polonium-210 after 115 days will be 4.5927 microgram
<span>The answer is true. If someone is born with blue eyes, then they are more susceptible to sunlight than someone with lighter eyes. The same idea applies to skin tone. Fair skinned people burn easier than those with darker skin.</span>
Answer:
Growth hormone
Explanation:
It is called growth hormone or somatotropin or peptide hormone because it is a substance that control and is responsible for the growth and development of some essential Tissues and cells in the body.
It is secreted by the anterior lobe of the pituitary gland located at the base of the brain.
The growth hormone help children grow taller,increase body mass and help reduce body fat.
Options for the questions are not given. They are as follows :
A ) 1,2,3
B) 2,3
C)1 ,3, 4
D)1
E) 1 through 4
Answer:
C) 1,3,4
Explanation:
Some aphids make black walnut trees their habitat in the forest and only prefer to mate with aphids who have the same habitat. This is an example of reproductive isolation since these aphids now have different mating preferences and hence are isolated from rest of the aphids. The isolation occurred on the basis of difference in habitats so it is also an example of habitat isolation. Since the mating is prevented all together it is also an example of prezygotic barrier i.e. formation of zygote is inhibited. However, it is not an example of allopatric speciation since the aphids are not separated geographically from each other. They are present in the same area but have different habitat preference. Hence, option C is correct answer.
