BIOLOGY LESSON NOTE ON CROP PROPAGATION

TOPIC: DIFFERENCES BETWEEN PLANT AND ANIMAL CELL
Here are some key differences between plant and animal cells:
1. Cell Wall
Plant Cell: Plant cells have a rigid cell wall made of cellulose outside the cell membrane, providing structural support.
Animal Cell: Animal cells lack a cell wall; they only have a flexible cell membrane.
2. Shape
Plant Cell: Plant cells are typically rectangular or square-shaped.
Animal Cell: Animal cells have a more rounded or irregular shape
3. Chloroplasts
Plant Cell: Chloroplasts, responsible for photosynthesis, are present in plant cells.
Animal Cell: Animal cells do not contain chloroplasts.
4. Vacuole
Plant Cell: Plant cells have a large central vacuole for storing water and nutrients.
Animal Cell: Animal cells have smaller vacuoles or sometimes none at all.
5. Lysosomes
Plant Cell: Lysosomes, responsible for cellular waste digestion, are less common in plant cells.
Animal Cell: Animal cells typically have more lysosomes
6. Centrioles
Plant Cell: Plant cells lack centrioles, which are essential for cell division in animal cells.
Animal Cell: Animal cells have centrioles involved in cell division.
7. Plastids
Plant Cell: Apart from chloroplasts, plant cells may contain other plastids like chromoplasts (for pigments) and leucoplasts (for storage).
Animal Cell: Animal cells do not have plastids.
8. Nucleus Position
Plant Cell: In plant cells, the nucleus is usually located near the center of the cell.
Animal Cell: In animal cells, the nucleus is often located closer to the cell's edge.
9. Mitosis vs. Cytokinesis
Plant Cell: Plant cells undergo both mitosis and cytokinesis, resulting in the formation of a cell plate during cell division.
Animal Cell: Animal cells undergo mitosis followed by cleavage during cytokinesis.
10. Motility Structures
Plant Cell: Plant cells lack structures for motility like cilia or flagella.
Animal Cell: Animal cells may have cilia or flagella for movement in some cases.
These are some of the fundamental differences between plant and animal cells. Each type of cell has unique features that suit its role within the organism
Ten multiple-choice questions about the differences between plant and animal cells:
1. What is a characteristic feature found only in plant cells?
a) Chloroplasts
b) Mitochondria
c) Centrioles
d) Nucleus
2. Which organelle is responsible for photosynthesis and is exclusive to plant cells?
a) Ribosome
b) Golgi apparatus
c) Chloroplast
d) Lysosome
3. What is a structure found in animal cells but not in plant cells?
a) Cell wall
b) Vacuole
c) Nucleus
d) Mitochondria
4. Which cell type typically has a round or irregular shape due to the absence of a rigid cell wall?
a) Plant cell
b) Animal cell
5. Which organelle is responsible for breaking down cellular waste and is more prevalent in animal cells?
a) Golgi apparatus
b) Vacuole
c) Lysosome
d) Endoplasmic reticulum
6. Plant cells store water, ions, and nutrients in a large central structure known as the:
a) Nucleus
b) Lysosome
c) Vacuole
d) Ribosome
7. Animal cells rely primarily on what structure for maintaining their shape and protecting the cell?
a) Chloroplast
b) Cell wall
c) Cytoplasm
d) Vacuole
8. Which cell type typically contains more than one small, round-shaped nucleus?
a) Animal cell
b) Plant cell
9. Which type of cell division is involved in the growth and repair of animal cells but not plant cells?
a) Mitosis
b) Meiosis
c) Cytokinesis
d) Binary fission
10. In which type of cell would you expect to find both centrioles and cilia?
a) Animal cell
b) Plant cell
Answers:
1. a) Chloroplasts
2. c) Chloroplast
3. b) Vacuole
4. b) Animal cell
5. c) Lysosome
6. c) Vacuole
7. b) Cell wall
8. a) Animal cell
9. a) Mitosis
10. a) Animal cell
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