Which of the following statements about bacteria is false?
- a relatively small proportion of the species are pathogenic
- oxygen is necessary for the growth of all bacteria
- their "chromosome" is a single molecule of circular dna
- some possess membrane infoldings or invaginations that increase surface area available for respiration or photosynthesis
- they reproduce by binary fission

Oxygen is necessary for the growth of all bacteria.

Explanation:

This statement is false, because not all bacteria require oxygen to produce energy and grow. The bacteria that need oxygen to grow are called aerobic bacteria. But there are also bacteria that can produce energy without oxygen, these are called anaerobic. Some bacteria can adapt to both environments, these are called facultative anaerobes bacteria.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.

answer: c.

explanation: