2. The tundra is cold! Which of these temperature facts are true?
a. During the winter, temperatures can get down to -61 degrees F.
b. During the warmest month, average temperatures are between 32 and 50 degrees
c. The average annual temperature is between 10 and 20 degrees F.
d. All of these are true.

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane