Anytime we speculate about a problem and think of an answer based on what we see on TV or read on the Internet, we are forming a scientific theory.

True or False?

Describe how the students would use the apparatus to show that there were microorganisms present in the air in the laboratory. Remember to think carefully about experimental design and how to make the results reliable.

Which structure is found mostly in green plant cells but not in animal cells? A. Mitochondrion B. Cell membrane C. Nucleus D. Large vesicle

What are three pressures that lead to biodiversity according to E. O Wilsons Theory Of island Biogeography

A DNA sequence is shown. AAT - CCG - GTG Which sequence best shows the result of a substitution mutation in the DNA?

Income level is the most accurate factor in determining support levels for police. a. True b. False

Why are cell walls important to plants?

Explain the concept of absolute zero.

The cycle repeat when the carbon stored in the atmosphere as carbon dioxide gas is taken

Which phrase describes the study of ecology? a. transfer of light energy to chemical energy b. organisms that reproduce and maintain structure c. comparing biotic and abiotic ecosystems d. how living things are interconnected with their environment

In an energy pyramid, the amount of energy at the producer level is 475,650 kilocalories. The pyramid has four trophic levels, including the producer level.