Which of the following statement about ribosomes is correct? A. Structurally different from free ribosomes
B. Enclosed in their own membrane
C. Concentrated in cisternal space of RER
D. Attached to the cisternal surface

The green colored pigment in chloroplasts is? a. nitrogen b. chlorophyll c. chlorophorm d. chlorofloromethane

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures