Tag: multicellular organisms

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Questions Related to multicellular organisms

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

Match the following:
A                                                                                B
A. Barr body                             1   Gives a grey colour to the
                                                          cell body
B. Purkinje cells                       2. Condudion muscles of
                                                        heart.

C. Nissl bodies                           3. Present in neurilemma
D. Schwann cell                          4. Certain neurons having
                                                           flask shaped cylons.

E. Purkinje fibres                          5. Found in cylons of female.
The correct pairing is.

  1. 5, 4, 1, 3, 2

  2. 3, 2, 5, 1, 4

  3. 5, 2, 1, 3, 4

  4. 4, 3, 2, 5, 1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Barr bodies are found in the cells of females (5). Purkinje cells are flask-shaped neurons in the cerebellum (4). Nissl bodies give a grey color to the cell body (1). Schwann cells are present in the neurilemma (3). Purkinje fibers are conduction muscles of the heart (2).

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

Few genes are found in all types cells

of differentiated multicellular organisms of high

class. It is called

  1. Key genes

  2. Core genes

  3. House keeping genes

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Core genes refer to the genes present in all the cells of an organism.
Housekeeping genes are those genes which are always expressed in a cell and code for various proteins that are required for the normal functioning and sustenance of cell. These genes are expected to maintain constant expression levels in all cells and at all conditions. Lethal gene is the gene that generally formed by the mutation and causes the death of the organisms.
Thus, the correct answer is option B.
Multiple choice botany caskets of life the cell structure multicellular organisms number and shape of cells

Who believed in the individuality of cells?

  1. Leeuwenhoek

  2. Lamarck

  3. Dutrochet

  4. Malpighi
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In 1809, Lamarck concluded that all living beings are formed of cells. Living substance was first observed by Corti in 1772 and was named sarcode by Dujardin in 1835. Dutrochet believed in the individuality of cells, i.e., living organisms are made up of a number of individual cells.

So, C is the correct option. 

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

A multicellular organism possesses

  1. Differentiated cells.

  2. Undifferentiated cells.

  3. Dedifferentiated cells.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A multicellular organism attains its multicellularity from a single cell. Single totipotent cell undergo number of mitotic and meiotic divisions to give rise to a multicellular structure where cells undergo differentiation to a particular function. Some of the cells are undifferentiated such as stem cells which can give rise to any type of cells of the body. Also multicellular organisms undergoes dedifferentiation process where a differentiated cell revert back to totipotent cell and can again differentiate to a particular type of cell witha particular function. So Multicellular organisms posses all these type of cells so Answer D is correct.

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

Human egg has a volume larger than human sperm by

  1. $100,000$
  2. $10,000$
  3. $1000$
  4. $100$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In short a gamete is an egg cell (female gamete) or a sperm (male gamete). This is an example of anisogamy or heterogamy, the condition in which females and males produce gametes of different sizes. This is the case in humans, the human ovum has approximately 100,000 times the volume of a single human sperm cell. 

Hence A is the correct option.

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

"Each cell leads a double life" was first proposed by

  1. Schleiden.

  2. Grew.

  3. Von Mohl.

  4. Malpighi.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Schleiden and Schwann presented a cell theory which proposed that each cell is itself is an organism which has all attributes of life. Each cell is living its individual life as well as the as a group of tissue which has become an integral part of plant. So Schleiden while observing plant cells discovered this double life of each cell. So option A is correct.

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

Functionally important dead cells are

  1. Cork cells.

  2. Tracheary elements.

  3. Endothelial cells.

  4. Both A and B.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cork cells (phellem) are dead at maturity and provide protection. Tracheary elements (xylem vessels and tracheids) are also dead at maturity and function in water transport. Both are functionally important dead cells.