Tag: multicellular organisms

Questions Related to multicellular organisms

The number of types of cells found in human body is

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. $20$

  2. $30$

  3. $260$

  4. $300$

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Correct Option: C

Multicellularity is useful for

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Forming protective covering.

  2. Retaining cell size small.

  3. Division of labour.

  4. All the above.

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Correct Option: A

Any organism performed all the activities by single cell is called as

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Multicellular

  2. Unicellular

  3. Acellular

  4. Plants

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Correct Option: B
Explanation:

An organism which performs and exhibits all functions of life via a single cell, it is an unicellular organism. Such as prokaryotes like bacteria, eukaryotes like yeast are unicellular organisms. They lack conglomerate of cells (tissue) or organ systems to perform specific functions. All the cellular functions for it to be living are performed by the individual cell.  So, the correct answer is 'Unicellular'.

Which of the following statements concludes that ruminants are multicellular animals?

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. They have specialized organs for digestion.

  2. They can reproduce.

  3. They have lungs for breathing.

  4. Both A and C.

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Correct Option: D
Explanation:

Reproduction is the characteristic for living organisms i.e., both unicellular and multi cellular organisms can reproduce irrespective of their cellular level. But, only multi cellular organisms have specialized organs for digestion and respiration/breathing that is GIT (Gastro Intestinal Tract) and Respiratory tract respectively, unlike unicellular organisms who respire and engulf food by general body surface. Thus, digestive tract and respiratory tract are defining feature of multicellular organism (ruminant). 
So, the correct answer is 'Both A and C'.

Fishes are multicellular animal because

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. It has organs and organ system.

  2. It has streamlined body

  3. It has scales

  4. None of the above

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Correct Option: A

Identify the unicellular organism.

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Algae

  2. Amoeba

  3. Snail

  4. Ant

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Correct Option: B
Explanation:

Some living organisms are made up of once cell only, these are called unicellular. These organisms have a large surface area to volume ratio and rely on simple diffusion to meet their needs. An example of a unicellular animal is Amoeba. Amoeba feed on smaller organisms such as bacteria.

Which of the following characteristics concludes that Amoeba is a unicellular animal?

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. It is able to move.

  2. It has a single cell.

  3. It lacks specialized organs for various function.

  4. Both B and C

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Correct Option: D

Paramoecium is a multicellular animal.

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. True

  2. False

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Correct Option: B
Explanation:

The organisms can be broadly classified into two groups, namely unicellular organisms and multicellular organisms depending upon the number of cells. Unicellular organisms are made up of only one single cell. Examples include Amoeba, Paramecium, yeast, bacteria. Multicellular organisms are those organisms that are made up of more than one cell. Examples include human beings, animals.

Hence the statement paramoecium is a multicellular animal is false. 

Cells are composed of highly independent and randomly interacting components.

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. True

  2. False

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Correct Option: B
Explanation:

The cell is a basic biological unit of living organisms.

A cell contains different membrane-bound organelles which are structural and functional units constructed from several macromolecules bonded together.A typical animal cell contains, the nucleus which possesses genetic material DNA, mitochondria to generate energy, nucleolus in the nucleus to produce ribosomes, ribosomes to produce proteins and endoplasmic reticulum which packages and transports proteins, sugars and lipids to Golgi bodies to distribute them through lysosomes to different parts of the cell. All organelles are anchored in cytoplasm of the cell and work in harmony with each other.
Therefore the option B is correct.

Which one of the following pairs of selectable marker genes and substrates used to select transformed cells is not correctly matched?

botany caskets of life the cell structure multicellular organisms number and shape of cells

  1. Npt II-Kanamycin

  2. Hpt- Hygromycin

  3. Dhfr- Gentamycin

  4. Bar- Bialaphos

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Correct Option: A