What organelle is in both plant and animal cells?
a. centriole
b. mitochondrion
c. chloroplast
d. cell wall

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

What are the pros and cons of transect sampling?