Describe three different ways that amphibians may absorb oxygen.

Why is it important that an expeirement include a control group

Describe what happens to an egg during the first 14 days of the cycle?

Echinoderm reproduction typically is a. sexual reproduction by budding. b. sexual reproduction with internal fertilization. c. by regeneraton. d. sexual reproduction with external fertilization.

What is an example of a hypothesis leading to a new experiment? A. Upon seeing bacteria under the microscope, scientists theorized that they could be the cause of illness. B.

In a symbiotic association, such as a lichen, a fungus provides mineral nutrients to a (n)

The loss of the ability of the larynx to produce normal speech sounds is called:

Explain how a blood glucose concentration of 7.5 mmol dm-3 would be brought back to normal in the body of a mammal and why this is a negative feedback mechanism

What is the salinity of ocean water

Which of the following could describe a population that is decreasing in size

Which creature cannot survive in the presence of oxygen? Give Examples. What does the creature need to survive instead of oxygen?