Tag: zoology

Questions Related to zoology

Wool is obtained from the fleece of __________________

zoology economic importance of plants and animals animal breeding animal husbandry and its importance introduction to animal husbandry

  1. Goat

  2. Sheep

  3. Horse

  4. Both A and B

Show answer
Correct Option: B
Explanation:

  • Sheep is an animal that has a rich layer of wool over it. It is used for economic purposes. Many blankets, sweaters, jackets, etc are obtained from sheep wool.

So the correct option is B.

Management and care of farm animals is known as________________

zoology economic importance of plants and animals animal breeding animal husbandry and its importance introduction to animal husbandry

  1. Dairy technology

  2. Caring

  3. Animal husbandry

  4. None of these

Show answer
Correct Option: C
Explanation:

  • Animal husbandry can be defined as the management and care of farm animals by humans for profit, in which genetic qualities and behavior, considered to be advantageous to humans, are further developed. It can also be considered as the practice of selectively breeding and raising livestock to promote desirable traits in animals for utility, sport, pleasure, or research. 

Therefore, the correct answer is option C.

During egg laying period, they need enough ______ which increases the fertility.

zoology economic importance of plants and animals animal breeding animal husbandry and its importance introduction to animal husbandry

  1. Space and light

  2. Dark and space

  3. Space and temperature

  4. Temperature and pressure

Show answer
Correct Option: A
Explanation:

The correct answer is 'space and light'

Egg laying like any other process is dependent on environmental cues to progress like sunlight which needs to be adequate during this period. Also to be able to lay healthy eggs that dont get infected with microbes or break there needs to be enough space for laying them.

Which of the following is an incorrect match of cell junction along with its structure and function?

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Cell junction - Tight junctions,
    Structure - Tightly bound, leak proof, fibrous protein 'belt' that surrounds cells ,
    Functions - Organizing junction : hold cells together such that material passes through but not between the cells.

  2. Cell junction - Desmosomes
    Structure - Intermediate filaments linked to adjoining cells through cadherins cytoskeleton.
    Functions - Anchoring junction : "buttons" cells together.

  3. Cell junction - Plasmodesmata
    Structure - Six transmembrane connexon proteins creating a "pipe" that connects cells
    Function - Communicating junctions : allow passage of small molecules from cell to cell in a tissue.

  4. Cell junction - Adherens junctions
    Structure - Transmembrane fibrous proteins.
    Functions - Anchoring junction : "roots" extra-cellular matrix to cytoskeleton.

Show answer
Correct Option: C

Which is true of contractile tissue of sphincter?
$1.$ Mesodermal
$2$. Contain stretch receptors
$3$. Rhythmicity
$4$. Indefatigible.

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. All the four

  2. Only $1, 2$ and $3$

  3. Only $1, 2$ and $4$

  4. Only $1, 3$ and $4$

Show answer
Correct Option: B

Muscles of iris and ciliary body originate from

zoology embryonic development in human muscle tissue structure of protein muscle tissues

  1. Ectodoerm

  2. Mesoderm

  3. Endoderm

  4. All of the above

Show answer
Correct Option: B
Explanation:

Muscles of iris and ciliary body are "smooth muscles". Smooth muscle cells arise from undifferentiated mesenchymal cells (embryonic mesoderm). These cells differentiate first into mitotically active cells, myoblasts, which contain a few myofilaments. Myoblasts give rise to the cells which will differentiate into mature smooth muscle cells. Iris is derived from neuroectoderm but the muscles of iris is derived from mesoderm. Thus, the correct option is B.

A human cell which contains a large amount of RER, many golgi bodies and a prominent nucleolus is most likely a

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Muscle cell

  2. Secretory cell

  3. Nerve cell

  4. RBC

Show answer
Correct Option: A

What is sarcomere ?

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Part between two H-lines

  2. Part between two A-lines

  3. Part between two I-bands

  4. Part between two Z-lines

Show answer
Correct Option: D
Explanation:
The sarcomeres are fibrous protein filaments that slide past one another when the muscle contracts or relaxes. It is basically the region between two Z-bands.
So, the correct answer is 'Part between two Z-lines'.
.

ER is lacking in 

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. muscle cells

  2. embryo cells

  3. adipose cells

  4. all of the above

Show answer
Correct Option: A

Where would you find mast cells ?

zoology tissue level of organisation muscle tissue structure of protein muscle tissues

  1. Adipose tissue

  2. Areolar tissue

  3. Yellow fibrous tissue

  4. White fibrous tissue

Show answer
Correct Option: B