Gas exchange in an echinoderm takes place through

A. book lungs.

B. skin gills.

C. lungs.

D. none of the above.

Explain in a complete sentence why it is important for scientists to share information with one another.

1. Where are red blood cells formed and destroyed?

If your grandparents are coming over for a couple of weeks, and they would like to know what is the weather there, what question will they might ask? A. When do you think most storms occur during the year? B. Does it rain much throughout the year? C.

All of the following are major functions of proteins except 1. control of biochemical reactions. 2. support for organs or tissues. 3. protection against foreign substances. 4. transport of necessary chemicals. 5. storage of energy.

How is heat transferred on Earth? air cells, radiation, convection, nitrogen cycle insulation, conduction ... select all that apply

A gene pool consists of all the genes within a

A scientist want to observe The structure that joins a cell to neighboring cells. How should the scientists observe

The cell cycle consists of A. Mitosis and interphase B. Meiosis and interphase C. Prophase and interphase D. Metaphase and interphase E. changes from a haploid to a diploid state

Why is the theory of abiogenesis just another example of the idea of spontaneous generation?

What is the role of the plasma cell in the antigen-antibody response? makes an antigen harmless without destroying it produces antibodies against the sensitizing antigen produces antibodies after an exposure to a known antigen clumps