Answer:
Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.
Answer:
The correct answer is D.
Explanation:
Because the scanning electron microscope uses an electron beam instead of a light beam to form an image, and the compound microscope uses lens and light.
Answer:
Rh negative can only receive Rh negative blood
Explanation:
When a person has Rh negative blood and receives a transfusion of Rh positive blood, the body does not recognize the antigen and attacks it as if it were an invader. This makes the person’s body essentially attack itself.
Technically, choice 3 is correct, but it is a poor answer:
Choice 1: Both parents would have to carry the recessive gene to produce a female child with hemophilia.
Choice 2: A male with hemophilia would have girls who are carriers (one copy of the recessive gene), but they would not have hemophilia.
Choice 3: If a woman has hemophilia (two copies of the recessive gene, which is extremely rare) then all of her sons will have hemophilia and all of her daughters will be carriers.
Choice 4: If the father has hemophilia, then none of his sons will have the disorder because his sons receive only the y chromosome from their father.
Hemophilia is typically inherited from a mother who is a carrier (has one copy of the recessive gene).
Answer:
Ralph is more stressed by the situation because Cory has a better set of social skills than Ralph.
Explanation:
Social skills are attributes that make interactions with others easy and comfortable for people. The scenario shows that Cory is more lively and sociable, thus, his social skills are better than Ralph's. Ralph on the other hand is apprehensive because he is not very sociable and finds it difficult to manage his interactions with people.
Ralph's situation is worsened by the fact that he is unfamiliar with the people in the party.