Question

i ) how does amoeba obtain its food?
ii ) how do substances like carbon dioxide (co2) and water (h2o) move in and out of the cell?
iii ) how is a bacterial cell different from an onion peel cell ?

Answer 1

i) Amoeba obtains its food by the process of endocytosis. It engulfs the food particle with the help of pseudopodia and then forms a vacuole around it. When the particle is completely trapped the amoeba secretes digestive enzymes that digests the food.

ii) CO2 is a gas so, it moves in and out of the cell by diffusion. Diffusion is a process in which the molecules intermingle due to their kinetic energy and movement of molecules is from higher concentration to lower concentration.

H2O moves in and out the cell by osmosis,

in which the water molecules move from lower solute concentration to higher solute concentration through the cell membrane.

iii) Bacterial cells are primitive cells hence, called as prokaryotic cells. They do not possess membrane bound organelles as mitochondria, lysosomes, etc. They also do not have well-defined membrane bound nucleus.

Onion peel cell is an eukaryotic cell with well-defined membrane bound nucleus, membrane bound organelles like mitochondria, vacuole, etc.

Answer 2

Answer:

1. phagocytosis

2 diffusion

3 They are the prokaryotic cells. They do not have organelles bounded with membranes as they do not have a complex body. They even lack membrane around the nucleus. Onion cell is a eukaryotic cell with well-defined membranes around the organelles.

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