Answer:
The results can be explained if the mutation for bag wings is sex-linked, dominant, and lethal in males.
Explanation:
When a trait is differently expressed in males and females, we must suspect that it's sex-linked.
If we consider the mutation for bag wings as sex-linked and dominant (B), and the wild-type allele (B+) is recessive, then the<u> expected offspring</u> resulting from the cross between a bag-winged female XᴮXᴮ⁺ (heterozygous) and a WT male Xᴮ⁺Y would be:
- 1/4 XᴮXᴮ⁺ bag-winged female
- 1/4 Xᴮ⁺Xᴮ⁺ wild-type female
- 1/4 Xᴮ⁺Y wild-type male
- <u><em>1/4 XᴮY bag winged male</em></u>
But the bag-winged male doesn't appear in the progeny, and the observed proportions of the other phenotypes are 1/3 each. This suggests that the mutation is lethal in males, and maybe in homozygosis in females as well.
Student 4 is correct. The farther the planet is from the Sun, the less pull it exerts on it.
Water and ions are regulated by antidiuretic hormone (ADH), which is released by lower blood pressure and stretch receptor sensation by heart and large arteries. ADH is released by the hypothalamus and leads to control of the osmolarity of the blood. This release restores the ions and water level, and blood pressure is increased to the required level.
Aldosterone is released by the adrenal cortex and leads to retention of water by regulating sodium and potassium in the blood.
During low blood pressure, enzymes renin is released and causes the formation of angiotensin II, which signals the adrenal cortex to release aldosterone.
Answer:
blood flow
Explanation:
An aqueous stagnant layer that overlies the apical membrane and the subepithelial blood flow are potential barriers to the absorption of drugs that readily penetrate the absorbing cell of the epithelium. The apical, basal, and basement membranes are potential barriers to the absorption of less permeable drugs.