Which of the following is always single stranded?

a. DNA

b. mRNA

c. DNA & RNA

d. dsRNA

How did cyanobacteria aid the evolution of complex life on land? Do you think cyanobacteria are as significant to this process today as they were during Precambrian time?

Which of the following is not a viral disease? A Heptatitis B ebola C influenza D HIV E diphtheria

What is the ph of a mosquito

The tendency for a solution of water and solutes to take up water across a selectively permeable membrane is called

What feature in a cell contains the DNA sequence to make a specific protein? genome gene nucleic acid chromosome

Which causes a decrease in the amount of dissolved oxygen in a lake? A. lower temperatures B. fertilizer runoff C. overfishing

If you were to breed a black male guinea pig to a brown female guinea pig in an attempt to determine which one was homozygous dominant and which one was homozygous recessive, how could you be certain that the guinea pigs are truly homozygous?

How many chemical bonds can each carbon atom form?

What could cause mutations to occur?

In what way are cells similar to atoms