Structural Organisation in Animals Test

Result

Structural Organisation in Animals Test - 75

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Weekly Quiz Competition

Question 1
1 / -0

Which tissue found on upper surface of skin?

A
Epidermis

B
Endodermis

C
Cuboidal Cells

D
Connective tissues

Solution

Tissues found on the upper surface of the skin is the epidermis which forms a protective covering and dermis is found beneath it.
Hence the correct option is A.
Question 2
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Choose the correct statement for Periplaneta americana

A
It has $$6$$ muscular hearts

B
It has $$10$$ thoracic segments

C
Anal style is present in both male and female

D
It is nocturnal and present in damp places
Solution
- The American cockroach (Periplaneta americana) is the largest species of common cockroach, and often considered a pest.
- It is nocturnal and present in damp places.
- These cockroaches are common in basements, crawl spaces, cracks and crevices of porches, foundations, and walkways adjacent to buildings.
- Hence It is nocturnal and present in damp places is the correct statement for Periplaneta Americana.
- So, the correct answer is 'It is nocturnal and present in damp places'.
Question 3
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What is incorrect regarding the given muscle tissue?

A
These muscle tissues are present in the heart only

B
These muscle tissues are closely attached to skeletal bones

C
These muscles tissues have junctions which allow the cells to contract as a unit

D
None of these

Solution

B. These muscle tissues are closely attached to the skeletal bones.
Reason: The given diagram of muscle tissues are cardiac muscles. The cardiac muscles or myocardium are involuntary, strained muscle cells that constitute the main tissue of the walls of heart. It is composed of individual heart muscle cells (cardiomyocytes) joined together by intercalated discs, encased by collagen fibres and substances that form the extracellular matrix.
Skeletal muscles are striated but unbranched.
Question 4
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Which one of the following statements is incorrect ?

A
In cockroaches and prawns excretion of waste material occurs through flame cells.

B
In Ctenophora, locomotion is mediated by comb plates

C
In $$Fasciola$$ flame cells take part in excretion

D
Earthworms are hermaphrodites and yet cross fertilization take place among them.

Solution

In cockroaches and prawns excretion of waste material occurs through malphigian tubules and not through flame cells. Other excretory structures in cockroach are fat bodies, nephrocytes, cuticle and uricose glands.

So, the incorrect statement is 'In cockroaches and prawns excretion of waste material occurs through flame cells'
Question 5
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The lining of organs such as the fallopian and the respiratory tract need specialized structure to facilitate movement. Which kind of epithelial tissue is found in such places ?

A
Columnar epithelium

B
Cuboidal epithelium

C
Squamous epithelium

D
Stratified squamous epithelium

Solution

A. Columnar Epithelium
Solution : The lining of organs like the fallopian tube and respiratory tract has columnar epithelium lined with cilia that facilitates movement of egg, mucus and other trapped particles.
So the correct answer is " Columnar Epithelium".
Question 6
1 / -0

Which one will excrete silicates consumed by earthworm along with food?

A
Intestinal cells

B
Basal cells

C
Chloragogen cells

D
Flame cells

Solution

In earthworms, chloragogen cells secretes silicates along with food. These cells are similar to the liver in vertebrates. They appear yellowish and store glycogen and neutralize toxins.
Question 7
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The septal and pharyngeal nephridia open into alimentary canal and are of enteronephric type. It is an adaptation for the

A
Conservation of water.

B
Conservation of heat.

C
Regulation of temperature.

D
Regulation of amino acids.
Solution
- Annelids have highly coiled tubules called nephridia which are involved in the removal of waste.
- The waste is discharged into the gut or the exterior through the nephridiopore.
- The nephridia in some of the annelids are of three types i.e., the pharyngeal, integumentary, and septal nephridia.
- The septal and pharyngeal nephridia open into the gut and, thus, are called enteronephric types.
- This helps to conserve maximum water through the process of reabsorption when waste passes through the gut.
Thus, the correct answer is option A.
Question 8
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Phaosome in earthworm is a

A
Lens

B
Pigment

C
Nephridium

D
Hormone

Solution

Photoreceptor cells in an earthworm contains lens called phaosome. These cells contain microvilli. Hence, the correct answer is option A.
Question 9
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Which of the following about Pheretima is incorrect ?

A
Genital papillae are present on $$17^{th}$$ and $$19^{th}$$segment

B
Male genital pores are present on $$18^{th}$$ segment

C
Clitellum is present on segments 24, 25 and 26

D
Segments of earthworm are called somites

Solution

Pheretima is a genus of earthworm and their body consists of about 100-120 small ring-like segments called or somites or metameres. All the segments are alike except for the first and last ones. Further, in a mature earthworm, there exists a band of glandular tissue known as the clitellum. This is present on segments 14 to 16 and forms a girdle around these and secrete mucous and albumen. Thus, the correct answer is option C.
Question 10
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In Pheretima nephridia occur in

A
All segment except 1 - 4 and 10 - 14

B
1 - 2, 4 - 6, 15 to last segments

C
Meganephridia in pre-clitellar and micronephridia in post-clitellar segments

D
Micronephridia in all segments and meganephridia from clitellar region to end

Solution

The nephridia may be of two types as micronephridia and metanephridia. Micronephridia is smaller in size, sometimes microscopic and are numerous in each segment. All the nephridia of Pheretima are microscopic micronephridia. Meganephridia is larger in size and present from clitellar region to the end. There are 200-250 of these exonephric metanephridia per segment. So, the correct answer is option D.