Biology
The diagram given alongside represents a cell. Study the same and answer the following questions :
- Is it a plant cell or an animal cell ? Give reason in support of your answer.
- Label the guidelines 1 to 8.
- Name one structure shown in the figure which is found in both plant and animal cells, but with different sizes.
- What is the protective membranous covering of the part shown as 4 called ?
- Name any two organelles.
Cell
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Answer
The given diagram shows an Animal cell. It does not have a cell wall and plastids. Also, the vacuoles are small, unlike the big ones present in a plant cell.
The guidelines 1 to 8 indicate:
1 → Cell Membrane
2 → Centrosome
3 → Cytoplasm
4 → Nucleus
5 → Nucleolus
6 → Chromosomes
7 → Mitochondria
8 → VacuoleVacuoles are present in both plant and animal cells. They are larger in size in plant cells, but smaller in size in animal cells.
Part 4 is Nucleus. Its protective membranous covering is called Nuclear membrane.
Two organelles are — mitochondria and endoplasmic reticulum.
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Related Questions
Name the three essential parts of the cell. Briefly describe the structure of cell membrane.
Write the significance of cell division (4 points).
The diagram given alongside represents a certain kind of cells found in humans. Study the same and answer the following questions.
- Identify the kind of cells.
- Label the guidelines 1 to 3.
- Which of the above labelled part regulates and coordinates the various life processes of the cell ?
- If we were to prepare a slide of the cells shown above, what stain will we use in order to clearly see the cells ?
- How many chromosomes are found in the part shown as 2 ?
For a classroom activity, class 6 students collected pond water samples from near their school. The water looked dirty and greenish, yet they couldn't spot any organism with the naked eye. Their Biology teacher then helped them observe the samples they collected under a microscope. To their surprise, they saw tiny organisms that had no visible legs or hands but showed quick movements.
Answer the following questions :(i) Identify the organisms based on the clues :
(a) Irregular-shaped, unicellular animal.
(b) A unicellular, slipper-shaped animal that moves with the help of cilia.
(c) A unicellular plant with flagella.
(ii) Mention one biological function that occurs in both unicellular and multicellular organisms.
(iii) Why do cells differ in their shapes?