The composition of a star can be identified by

A. its apparent magnitude

B. the size of the star.

C. the lines in its spectrum.

D. the intensity of its radiation.

What is the difference between mitosis abd meiosis?

Select the two systems that are most closely related to the situation or process described: Forming a scab over a cut on your knee Nervous Immune Integumentary Respiratory

Phosphorus is required to synthesize the deoxyribonucleoside triphosphates used in DNA replication. A geneticist grows some E. coli in a medium containing nonradioactive phosphorus for many generations.

Why do you think melissa is instructed to use the albuterol inhaler prior to exercise and before she ever has any symptoms?

The best way to prevent foodborne illness caused by e. coli (escherichia coli) is to

Life cycle of tobacco mosaic virus

How do producers differ from all other organisms in an ecosystem? A. All other organisms rely directly on the sun for energy. B. Producers are the only group capable of making their own food. C.

The same reptile known as a river turtle in illinois is called a cooter in florida. This language phenomenon is classified as

In rats, gene B produces black coat color if the genotype is B-, but black pigment is not produced if the genotype is bb.

Gregory is studying Lake Mairead. The lake has clear water and supports a healthy community of algae, fishes, and other aquatic organisms. Gregory hypothesizes that phosphorus is a limiting nutrient in the lake.