(a) (i) List three forms in which living cells exist (ii) Give one example each...
BIOLOGY
WAEC 2016
(a) (i) List three forms in which living cells exist
(ii) Give one example each of the forms listed in 1 (a)(a)
(b) Make a diagram, 6 cm — 10 cm long, of a typical plant cell and label fully
(c) (i) In a tabular form, state three differences between a plant cell and animal cell.
(ii) State three similarities between a plant cell and animal cell.
Explanation
(a) (i) Forms in which living cells exist
- Single/free-living
- Colony/colonial
- Filamentous/filament
- Part of a living organism.
(ii) Example
- Single/free-living -Amoeba/Chlamydomonas/Paramecium/Euglena
- Colony/colonial -Eudorina/Pandorinallolvox/Sponges
- Filamentous/filament - Spirogyra/Chladophora/Ulothrix/Zygnema/Oedogonium
- Part of living organism - cheek cell/onion cell/epidermal cell/parenchyma cell.
(b) Diagram of a typical plant cell
(c) (i) Differences between a plant cell and an animal cell
| plant cell | Animal |
| Has cellulose cell wall / rigid | Lacks cellulose cell wall |
| Has one large central vocoule | has numerous/vocoule |
| has chloroplast | lacks chloroplast |
| Contains starch granules in its cytoplasm | contains glycogen granules in it cytoplasm |
| Usually larger in size | Usually smaller in size |
| Does not have lysosome | has lysosome |
| Does not have centrioles / centrosome | Has centrioles / centrosome |
| Has a regular / defined cell shape | has an irregular / indefinite cell shape |
| cytoplasm less dense | cytoplasm more dense |
| stores lipid as oil | stores lipid as fat |
(ii) Similarities in plant cell and animal cell;
They both have cytoplasm; nucleus; vacuole; mitochondrion; Golgi body; (smooth/rough) endoplasmic reticulum; cell membrane/plasma membrane; ribosomes
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