Tag: zoology

Questions Related to zoology

Nictitating membrane is an example of

zoology animal diversity - ii (phylum: chordata) circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system frog

  1. Analogous structures

  2. Homologous structures

  3. Vestigeal structures

  4. All

Show answer
Correct Option: C
Explanation:

Nictitating membrane (Third eyelid or Plica semilunaris). It is thin, transparent and freely movable fold which is used to clean cornea in frog, pigeon, apes etc.

Cloaca is a small, median chamber that is used to pass
zoology animal diversity - ii (phylum: chordata) circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system frog

  1. faecal matter

  2. urine

  3. sperms

  4. all of these

Show answer
Correct Option: D
Explanation:

The cloaca is a small, median chamber that is used to pass faecal matter, urine and sperms. So, the correct answer is (d).

In a uriniferous tubule, what is the short and tubular region, that follows the Bowman's capsule known as?

zoology animal diversity - ii (phylum: chordata) circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system frog

  1. Neck

  2. Proximal convoluted tubule

  3. Henle's loop

  4. Distal convoluted tubule

Show answer
Correct Option: C
Explanation:

In a uriniferous tubule, 'Henle's loop' is the short and tubular region, that follows the Bowman's capsule.

So, the correct option is 'Henle's loop'.

Select the correct option:

Fill up the blanks in the following paragraph by selecting the correct option.
The vascular system of frog is well-developed ______ (i) type. The blood vascular system involves heart, blood vessels and blood. Heart has 3 chambers, two atria and one ventricle and is covered by a membrane called ______ (ii). A triangular structure called ______ (iii) joins the right attrium.

zoology frog circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system animal diversity - ii (phylum: chordata)

  1. (i)- open; (ii)- conus arteriosus; (iii)- neurilemma

  2. (i)- closed; (ii)- sinus venosus; (iii)- pericardium

  3. (i)- open; (ii)- neurilemma; (iii)- conus arteriosus

  4. (i)- closed ; (ii)- pericardium; (iii)- sinus venosus

Show answer
Correct Option: D
Explanation:

The vascular system of frog is well-developed (i) 'closed' type. The blood vascular system involves the heart, blood vessels and blood. The heart has 3 chambers, two atria and one ventricle and is covered by a membrane called (ii) 'pericardium'. A triangular structure called (iii) 'sinus venosus' joins the right atrium.

So, the correct answer is '(i)- closed ; (ii)- pericardium; (iii)- sinus venosus'.

Pyramids in kidney of frog are ___________.

zoology animal diversity - ii (phylum: chordata) circulatory system in frog frog - digestive system, circulatory system, excretory system and reproductive system frog

  1. Two

  2. Five

  3. Ten

  4. Absent

Show answer
Correct Option: A

In autologous stem cell transplant, the stem cells are obtained 

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. From the individual itself.

  2. From a donor.

  3. From the identical twin.

  4. Both A and B.

Show answer
Correct Option: A
Explanation:

There are different types of transplantations in which the donor from which the stem cells are received differs. In the case of the autologous stem cell transplantation, the stem cells are obtained from the same individual. The peripheral blood or the bone marrow stem cells can be used for the purpose of transplantation. There are no chances of rejection due to graft versus host reaction. 

Thus, the correct answer is option A. 

Which of the following diseases can be cured by stem cell therapy?

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. Haematopoiesis

  2. Lymphoma

  3. Dwarfness

  4. Both A and B

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Correct Option: B

Why is umbilical cord preserved after the birth?

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. It is a source of RBC.

  2. It has a greater content of blood plasma.

  3. It is a source of stem cells.

  4. All of the above.

Show answer
Correct Option: C
Explanation:

Stem cells are found in all organisms and are capable of dividing to form new cells which can be differentiated into various types of specialised cells. The umbilical cord is the structure which attaches the fetus with the placenta in the maternal womb. The umbilical cord contains the embryonic stem cells which can use for the treatment of disorders during the life of an individual. The umbilical cord can be preserved during the child birth.

Thus, the correct answer is option C.  

Among the following stem cells, which are found in the umblical cord 

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. Embryonic stem cells

  2. Adult stem cells

  3. Cord blood stem cells

  4. All of the above

Show answer
Correct Option: C
Explanation:
The umblical cord contains haematopoetic stem cells that can give rise to both RBCs as well as WBCs and are used in the treatment of blood cell diseases like Leukemia. Haematopoetic stem cells are also called cord blood stem cells
So, the correct answer is 'Cord blood stem cells'

Do animals have tissues similar to meristematic tissues in plants? If yes, what are they?

zoology biotechnology and its applications stem cell stem cells and applications stem cells organ donation and body donation blood and organ donation

  1. Epithelial cells

  2. Germ cells

  3. Stem cells

  4. They don't have similar cells

Show answer
Correct Option: C
Explanation:

Animals have stem cells which are similar to the meristematic tissues in plants. They are capable to divide. These are undifferentiated cells which later on gets specialized. They divide continuously and help in the growth and repair of the body.