Which main sequence stars are the most massive?

A. red

B. orange

C. yellow

D. blue

I don't think it's D it might be A?

How is drilling samples evidence of sea floor spreading?

Chris is about to do an experiment to measure the density of water at several temperatures. His teacher has him prepare and sign a safety contract before beginning the experiment.

Dr. Paul Ehrlich observed that the differential stain developed by Dr. Gram suggested bacteria could be killed differentially by chemicals. He called these potential antibacterial agents "magic bullets".

A tool used to measure air pressure A. thermometer B. hygrometer C. barometer

Which of the following is a function of the geosphere? a. facilitating the movement of water through spheres through transpiration b. providing a moderate, livable climate c. facilitating the process of photosynthesis d.

In humans, the ability to produce the pigment melanin is dominant over the lack of that ability, a condition known as albinism.

A researcher has sequenced a gene that has two alleles. she has a mixture of both alleles and clones them into e. coli using plasmids. she is interested in one particular allele that is correlated with a disease.

List 3 roles of DNA in relation to genetic information:

Select all the offspring phenotypes that could be produced from a BbEE x bbee cross (shown above). black fur, red eyes black fur, black eyes white fur, black eyes white fur, red eyes

A cell is placed into a hypertonic solution. How does the concentration of water differ in the solution and the cell cytoplasm?