Of the following steps in a scientific investigation, the last to be done is usually:

A. experimenting

B. observing

C. producing a model

D. hypothesizing

Why do scientists like to give every organism its own scientific name?

Which of the following does NOT describe the behavior of cells in a malignant tumor? a. carry out metastasis b. lose the ability of contact inhibition c. multiply rapidly d. remain in one site

A tornado is dangerous mostly because of its

Select the two species that are likely to be the most closely related by evolution

Based on the graph you see here, when did the US birthrate grow most quickly?

Primary differences between archaic homo sapiens and modern homo sapiens is

What would be the consequence of of absence of tRNA in the cytoplasm?

Water which is returned to the environment after secondary treatment is known as:

Which tool is best used to predict the outcome of various genetic combinations?

What part of the brain consists of two large hemispheres?