The tiny hollow air sacs in the lungs where gas exchange takes place are the a. alveoli b. lymph nodes c. capillaries d. bronchioles

In which phase will crossing-over occur? A. Meiosis II B. Metaphase II C. Mitosis D. Prophase I

Which of the following is true of red blood cells? A. They have multiple nuclei B. Once created in bone marrow, they circulate for our lifetime C. They live for only 120 days D. They live for only about 20 days

Does natural selection always result in an increase in genetic diversity?

Influenza virus can remain infective for how many hours once outside the body

He electron transport chain (etc), or respiratory chain, is linked to proton movement and atp synthesis. select the statements that accurately describe the electron transport chain. choose all that apply.

What causes a glacier to grow or recede

Chronic lymphocytic leukemia (cll) commonly causes hypogammaglobulinemia. this makes clients with cll more susceptible to infection. what are the most common infectious organisms that attack clients with cll?

Hypothesis for does compost cause plants to grow faster and taller than artificial fertilizer

Legumes enrich soil by adding nitrogen to it through their?

Compare and contrast the individual's ability to move, exchange gases, and digest food at the two temperatures. A) A warm frog can digest much faster, but a cold frog can move and breathe much faster.