Which of the following is a physical property that all matter has?

a. color

b. density

c. hardness

d. shape

Which of these statements about heterochromatin are TRUE?-Heterochromatin is found in the telomeres and centromere.-Heterochromatin remains relatively condensed (tightly coiled) during the cell cycle.-Heterochromatin has relatively few genes.

Isotopes that release energy in the form of radiation are A. stable B. unstable C. curies

Which cell in the skin plays the role of a macrophage

Which of these processes are chemical reactions? boiling an egg crushing spices vegetables rotting chopping vegetables dew forming

There are two machines in this photograph. The wheelchair is a compound machine. Is the other machine in the photograph a simple or a compound machine? A. simple machine B. compound machine

Which of the following is a constructive process? deposition detachment transport plucking

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals

According to the Hardy-Weinberg principals, which of the following can prohibit genetic equilibrium?

Rickettsia are obligate intracellular parasites that are transmitted by arthropods. In which of the following places would you most likely find the parasites living in the host organism during the course of infection? A.

How are viruses able to move between species?