Answer:
This article discusses a group of scientists who are studying an ecosystem. What ecosystem are the scientists studying? A the Hudson River ecosystem.
Explanation:
Olafactory bulbs because it has to do with nerve signals and neurons. Brain because it is the center of the nervous system and the closest to the nose in terms of the nervous system.
It is the last choice because their similar bone structures suggest they once had a common ancestor, which is why they are all mammals.
<h2><u>Answer</u> :</h2>
The correct option is A. If a dominant allele is present, the recessive allele won’t be seen.
The dominant allele is the one which appear, and the recessive one isn't shown.
For example - If a person has 2 alleles of eye colour as B ( black ) and b ( brown ), in which black is dominant and the brown one is recessive, then the person will have black eye colour because only dominant allele shows its characteristics.
_____________________________

Answer: A diet rich in calcium and vitamin D supplements.
Some examples off calcium rich foods include Cheese; Yogurt; Sardines and Canned Salmon; Beans and Lentils; Almonds; Whey Protein; Some Leafy Green.