Chloroplasts are thought to have originated from symbiotic
a. archaebacteria.
b. cyanobacteria.
c. green algae.
d. aerobic eubacteria.
Ans: b. cyanobacteria.
You might also like to view...
Discuss the advantages of a closed circulatory system, compared to an open circulatory system
What will be an ideal response?
The stroma of a chloroplast is most like which
of the following cellular structures?
a. ribosomes b. cell membranes c. the cytoplasm d. nuclei e. mitochondria
Why are the testes suspended outside the body in humans?
What will be an ideal response?
Osmosis occurs when there is a different concentration of solute molecules on each side of the membrane. The drawing below shows a beaker containing a 30% salt solution and a suspended cell containing a 10% salt solution. What statement best describes the cell after 20 minutes?
A. Water will move from the cell into the beaker, resulting in a smaller cell. B. Water will move from the beaker into the cell, resulting in a larger cell. C. Salt will move from the cell into the beaker, resulting in a smaller cell. D. Salt will move from the beaker into the cell, resulting in a larger cell.