Which variable stars have pulsation periods between 1.5 hours and 1.2 days?

A. Cepheid variables

B. RR Lyrae variables

C. Protostars

D. Quasars

A major function of the nervous system is the autonomic operation. Which items are related to this? eye movements cerebellum digestion heart medulla muscle coordination involuntary muscles (You can pick more than one.)

Which of these is a natural wood defect rather than a result of improper storage and conditioning? A) knot B) warp C) split D) stain

Why did Hershey and Chase label the viral DNA with radioactive phosphorous and not radioactive sulfur? a. DNA contains phosphorus and no sulfur. b. Proteins contain phosphorus and no sulfur. c. DNA contains sulfur and little phosphorus. d.

Why are the guard cells so important in a leaf?

Glucose molecules provide the chemical energy cells use to carry on life processes. Some energy is always lost when cells break down the glucose molecules.

In terms of brain size and overall intelligence, which of these best describes hominid evolution over the last few million years?

How often do tides rise and fall? A. Once a day b. Twice a day c. Every 14 days d. Every24 h, 50m

Which of the follow is NOT a characteristic of fungus-like protists? Asexual reproduction Cell walls Autotrophic Produce spores

Which movement results after the contraction of the serratus anterior muscle?

How does selective breeding support Darwin's hypothesis about evolution?