In order for a theory to be considered valid it must be: observed at least one time recorded repeatable inferred from personal interpretation

A student wants to compare the amounts of CO2 given off by yeast provided with different amounts of sugar. The student places a balloon over each container to catch the released CO2.

A scientist hypothesized the temperature at which an alligator egg is incubaed will determine whether the alligator will be a male or female. What is the dependent?

Which process in an apple tree primarily results from cell division? Pick a choice: A) Growth B) Photosynthesis C) Gas exchange D) Waste removal

A pathway by which a chemical element or molecule moves through both biotic and abiotic compartments of an ecosystem.

Which best describes a likely result for the excretory system if the kidneys are weakened? A. Blood would not be filtered correctly and blood and waste would be excreted. B.

Question 1 Bernoulli's principle states that fluid velocity decreases when flow is restricted. 1) True 2) False

How many cells are produced in Mitosis

Which of the following shows the correct unit of weight listed from largest to smallest? A. Gram, microgram, milligram, kilogram B. Microgram, milligram, gram, kilogram C. Kilogram, gram, milligram, microgram D. Milligram, microgram, kilogram, gram

Choose the incorrect statement The generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron.

Temperature can be used to measure a particle's chemical energy. ionic energy. kinetic energy. potiental energy.