Which level on the energy pyramid has the third most energy?

A. primary producers

B. primary consumers

C. secondary consumers

D. tertiary consumers

What three substances can raise blood cholesterol level and why is this a concern?

3. (4pts) A constraint is a limitation or condition that must be satisfied by a design. For example, you may onl be able to use certain materials, or you might want the device to operate at a certain speed.

Which of the following does inhaling agents such as coal dust cause? a. tuberculosis b. pneumonia c. bronchitis d. pulmonary fibrosis e. pulmonary tuberculosis

In comparing and contrasting different cultures, the gender roles: a. are always about the same (male and female) in all cultures b. are the same for males everywhere, but vary for females c. are the same for females everywhere, but vary for males d.

If you get discouraged while reading difficult material, do not stop reading. true or false

Why must cell division be different between asexual reproduction and sexual reproduction? A. Sexual reproduction requires that the amount of DNA in a cell be halved. B.

Which of the following brings amino acids to the ribosome for use in translation? 1. rRNA 2. tRNA 3. mRNA

What is the process which cells in your body become different types of cells?

Which of the following statements shows an example of operant conditioning? A.) A chicken learns that if it pecks on a button, a food pellet will be released into its cage. B.) Pavlov taught a dog to salivate every time it heard a bell. C.

A scientist has several specimens from the same time period from several thousand years ago. Which two specimens should he study so that he can learn about the amount of rainfall at that time and the kinds of plants that grew then?