How can hypotheses best be tested?

A. by asking questions

B. through experimentation

C. by forming an opinion

D. through technology

What one of the following items is a producer of pollution? a. forest b. oceans c. factories d. bicycles user: how many times in the history of earth has the number of species dropped drastically? a. 4 times b. 3 times c. 5 times d. 6 times

Which of the following elements is magnetic? A. aluminum B. lead C. iron D. tin

Based on the flow of energy and biomass in ecosystem, determine the rough proportion of producers and consumers needed in the ecosystem you are designing. write down how many plants to animals you think that you will need

If a circuit has a low voltage, is there any way to get a lot of energy from it? If so, how?

A breif summary of how a flowering plant reproduces

When the bleeding occurs it is referred to as the princple of

What is the product of protein digestion

What was produced as a result of the human genome project

Which of the following statements is true? A: all the populations in an ecosystem form a community B: a habitat represents all the biotic factors in an ecosystem C: The amount of nutrients in soil is an example of a biotic factor D: Only one

He nurse is assessing a 31-year-old female patient with abdominal pain. th nurse, who notes that there is ecchymosis around the area of umbilicus, will document this finding as a. cullen sign. b. rovsing sign. c. mcburney sign. d.