Which of the following is an example of an x-linked recessive disorder?
a. huntington disease
b. methemoglobinemia
c. color blindness
d. sickle cell disease

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

One of the purposes of transcription is to produce a sequence of bases that