Which simple machines combine to make scissors?

A.

one lever and two wedges

B.

two levers and two wedges

C.

one inclined plane and two wedges

D.

two inclined planes and two wedges

3/13 When do scientific ideas change?

What is an example of quantitative variation?

Which of the following structures is NOT found in both plant and animal cells? A) Chloroplast B) Cytoskeleton C) Ribosomes D) Mitochondria

Which item is responsible for joining nucleotides to build a new strand of DNA? a. DNA polymerase b. Nitrogenous bases End of exam c. Hydrogen-bond breaking proteins d. Telomere

Why is it important to know the division or phylum of the various plant species growing in your backyard?

Activation of the anterior cingulate cortex would be expected to

Particles in a warmer substance have a. average kinetic energy than particles in the substance when it is cooler

All bacteria are classified as A. Eukaryotes. B. Prokaryotes. C. Archaea. D. Protista.

All the systems of the body work together to keep the internal environment of the body constant within certain limits. this process is called a. homeopathy. b. homoeostasis. c. positive feedback. d. neuroglia.

An experiment for a new asthma medication was set up into two groups. Group one was given the new drug for asthma, while group 2 was given a sugar pill. The sugar pill serves as a: