Which of the following passes from the alveoli into the blood during gas exchange? a. carbon dioxide b. oxygen c. water d. nitrogen

Does female sperm and male sperm look different

True or False: Each mineral is made of an element, or a combination of elements, that are arranged in a definite repeating structure.

A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has about 25000. Approximately 1000 of these genes are present in both cell types.

Your initial population has 40 rabbits. Five are born and and three die. Four immigrate into the population and two emigrate out. What is the change in population? 44 36 2 4

Name and describe 5 different areas of biotechnology

How can individuals play a role in the evolution of an entire species

Which of these are found in the lymph? A. red blood cells B. white blood cells C. antibiotics D. platelets

The visual predation hypothesis proposes that:a) better vision allowed for better access to fruits and small insects b) primate traits arose as adaptations to preying on insects and small animals c) species could see predators from farther away,

A researcher wants to know whether children eating a high-protein breakfast will have a higher test grade. half of the children in the study eat a high-protein breakfast while the other half eats their normal diet.

What is the mass of an atom that has 4 protons, 5 neutrons and 4 electrons? 5 8 9 13