Question

E. Long answer questions.
1. Differentiate between the cellular organisation of amoeba and man
2. What is excretion? Why is it important? Name some wastes excreted by plants and animals.
3. list three ways in which living things reproduce. Explain with examples
4. Explain phototropism and geotropism in plants.
5. Write short notes on: a virus b. species​

Answer 1

(ANS 1).Difference 1:-

1.unicellular organisms are single celled organisms.

2.multicellular organisms have more than one cell.

difference 2:-

1.the unicellular organisms do various activities on its own.

2.multicellular organisms depend on other cells to perform various activities.

difference 3:-

1.unicellular organisms include eukaryotes and prokaryotes

2.multicellular organisms include eukaryotic cells only.

difference 4:-

1.unicellular organisms contain nucleus and some other components.

2.but multicellular organisms contain all components like mitochondria .......so on.

difference 5:-

1.unicellular organisms reproduce by asexual reproduction.

2.multicellular organisms reproduce by sexual reproduction.

difference 6:-

1.ex.amoeba, bacteria , paramaecium .... etc. are examples for unicellular organisms.

2.plants,animals,zygote,including humanbeings are examples of multicellular organisms.

difference 7:-

1.an injury of unicellular organisms affect the whole body which cause to death.

2.an injury of cell in multicellular organisms doesnot affect the whole body.

difference 8:-

1.life period is very short in unicellular organisms.

2.life period is larger than the unicellular organisms in multicelled.

difference 9:-

1.unicellular organisms donot have certain shape

2.multicellular organisms have definite shape.

difference 10:-

1.unicellular includes hetrotrophic.

2.multicellular organisms includes both autotrophic and hetrotrophic.

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