What is the half-life of strontium-90?

How do eukaryotic plant cells store and remove waste

To which category of biological molecules does cellulose belong?

The water on the Earth today has been sustaining life for millions of years.

The Northern Hemisphere is warmer in spring than in winter, because in spring A) the days are shorter. B) it gets more direct sunlight. C) the Earth is closer to the Sun. D) it is tilted away from the Sun.

Lipids that are manufactured by the body and can act as emulsifiers in food are called

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a) psychiatry b) physics c) botany d) biology

When evaluating your resources for authority, which of these question would you ask? A. Is the material too general, too technical, or just right for my needs? B. How recent is the information? C. Has this author been cited in other resources?

Which of these pairs is in Kingdom Fungi? A. mushrooms and bacteria B. diatoms and water molds C. mushrooms and yeast D. protist and virus

What is ne function of the smooth endoplasmic reticulum?

What are the distinguishing features of club mosses, whisk ferns, and horsetails? how are these plants different from ferns?