Question
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Cytoplasmic streaming shown by –
A) Cytoplasmic bacteria
B) Hydrilla leaf
C) Both A & B
D) None of the above

Answer
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Hint: Cytoplasmic streaming is also called cyclosis. It is the flow of cytoplasm inside the cell. It helps in the movement of fluid substances within the cell. Due to this movement nutrients, waste, proteins, and other substances are transported which are important for the growth.

Complete answer:
A) Cytoplasmic bacteria – They exhibit cytoplasmic streaming. This is also known as protoplasmic streaming. This helps in movement of substances. Cytoplasm helps bacterial cells in growth, metabolism, replication etc. It has water, enzymes, nutrients, wastes, gases and cell structures like ribosomes, chromosomes and plastids etc.
B) Hydrilla leaf – It is a submerged, perennial aquatic plant. Hydrilla has small, green, pointed leaves. Leaves of hydrilla show cytoplasmic streaming and it helps in movement of substances and grow in whorls of four to eight around the stem. The leaf margins are distinctly saw toothed. Hydrilla's small leaves are strap-like and pointed.

Correct option - Both A and B are correct options.

Note:Hydrilla is especially valuable to true vegetarians. It is used to provide complete nutrition, improves digestion, blood sugar control, increases endurance etc. Hydrilla produces tiny white flowers on long stamens. The leaves are green in color and translucent.
In cytoplasmic bacteria the cytoplasmic membrane is a semipermeable membrane that determines what molecules will enter and leave the cell. Its main function is that it is a selectively permeable membrane that regulates the passage of substances into and out of the cell.