Chloroplasts are thought to have originated from symbiotic

a. archaebacteria.
b. cyanobacteria.
c. green algae.
d. aerobic eubacteria.


Ans: b. cyanobacteria.

Biology & Microbiology

You might also like to view...

Why are the testes suspended outside the body in humans?

What will be an ideal response?

Biology & Microbiology

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.

Biology & Microbiology

Discuss the advantages of a closed circulatory system, compared to an open circulatory system

What will be an ideal response?

Biology & Microbiology

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

Biology & Microbiology