Diversity in Living Organisms Test

Result

Diversity in Living Organisms Test - 65

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Earthworm is highly useful as:

A
Their burrows make the soil loose.

B
They make the soil porous, leave their castings and take organic debris in the soil.

C
They are used as fish meal.

D
They kill the birds due to biomagnification of chlorinated hydrocarbons.

Solution

Earthworm is known as the 'friends of farmers' as they make burrows in soil and make it porous which helps in respiration and penetration of the developing plant roots.
The process of increasing soil fertility by the worms is known as vermicomposting.
Earthworm feed on the organic debris present in the soil.
So the correct answer is option B- 'They make the soil porous, leave their castings and take organic debris in the soil'.
Question 2
1 / -0

Cockroach is

A
Diurnal and herbivorous

B
Nocturnal and carnivorous

C
Diurnal and omnivorous

D
Nocturnal and omnivorous

Solution

Cockroaches are cosmopolitan in distribution. They usually inhabit kitchens, bakeries, hotels, sewage channels etc. They are nocturnal and move around during the night. They are omnivorous and scavengers devouring everything they come across. They also feed on dead corpses of their own fellows.
So, the correct answer is 'Nocturnal and omnivorous'.
Question 3
1 / -0

Which one of the following statements is correct?

A
Flatworms have a true coelom.

B
Fishes are radially symmetrical.

C
Birds are cold-blooded animals.

D
Body of earthworm is segmented.
Solution
A. Correct option is (D)
B. Explanation for the correct option
Flatworms do not possess a true coelom. Fishes are bilaterally symmetrical. Birds are warm-blooded animals.
Earthworms belong to the phylum Annelida. One of the characteristic features of an annelid is the segmented body.
Question 4
1 / -0

Earthworm helps farmers by:

A
Destroying harmful bacteria

B
Destroying harmful insects

C
Making soil porous and loose

D
Both A and B

Solution

Pheretima posthuma is known as the 'friends of farmers' as they make burrows in soil and make it porous which helps in respiration and penetration of the developing plant roots. The process of increasing soil fertility by the worms is known as vermicomposting. Earthworms feed on the organic debris present in the soil. Thus helping the farmers to increase the yield of the crop.
So the correct answer is 'Making soil porous and loose.'
Question 5
1 / -0

Which Earthworm is not recommended for vermicomposting.

A
Eudrilus eugeniae

B
Eisenia fetida

C
Perionyx excavatus

D
Pheretima posthuma

Solution

All earthworms are not used for vermicompost. Earthworms are classified as humus formers and humus feeders. Among which humus formers are good for vermicompost and they include Eudrilus eugenics, Eisenia fetida, Perionxy excavatus. Pheretima Posthuma is not recommended for vermicomposting as it is a humus feeder.
So, the correct answer is option D.
Question 6
1 / -0

Platyhelminthes have:

A
Three layers of germ cells

B
No coelom

C
Flattened body

D
All of the above features
Solution
Correct Option: D
Explanation:
- Platyhelminthes are triploblastic (have three germ layers).
- They are acoelomate (without any body cavity).
- They have bilateral symmetry.
- Their body is unsegmented and dorso-ventrally flattened.
Hence, platyhelminthes have three layers of germ cells, no coelom and flattened body.
Question 7
1 / -0

Crustaceans, spiders and insects are able to regenerate their

A
Abdomen

B
Thorax

C
Head

D
Limbs

Solution

Formation of new parts of the body, which are lost due to injury or accidents is called Restorative regeneration. It occurs in crustaceans, spiders and insects. In these organisms, this type of regeneration occurs when legs lost.
So, the correct option is ‘Limbs’.
Question 8
1 / -0

The animal with bilateral symmetry in young stage and radial pentamerous symmetry in the adult stage belongs to the phylum.

A
Annelida

B
Mollusca

C
Cnidaria

D
Echinodermata

Solution

Echinoderms are exclusively marine invertebrate, having some interesting features. Their life cycle is usually complex. In most echinoderms, the embryo develops into a planktonic larva with a bilateral symmetry, that attains a pentaradial symmetry in the adult stage.
Example, Asterias
So, the correct answer is option D.
Question 9
1 / -0

A mammal, which does not have pinna is:

A
Platypus

B
Whale

C
Seal

D
All of the above

Solution

Pinna is the outer or external part of ear that receives soundwaves and transfers them to the auditory canal. Pinna is present in mammals with some exceptions. Egg laying mammal Platypus lacks pinna and due to this, its sense of hearing is not strong. The ears of Platypus have a small opening towards the outside from which sound waves enter.
So, the correct answer is 'Platypus'.
Question 10
1 / -0

The characteristics of class Reptilia are _______________________.

A
Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears

B
Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca

C
Fresh water animals with bony endoskeleton, air-bladder to regulate buoyancy

D
Marine animals with cartilaginous endoskeleton, body covered with placoid scales

Solution

Organisms under the class Reptilia are identified as cold-blooded organisms and their body is covered by dry and cornified scales. They have three-chambered heart, except crocodiles, and they breathe through the lungs. These animals do not possess external ears, instead, they have tympanum.
Hence, option A is the correct answer.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Diversity in Living Organisms Test - 65

Result

Diversity in Living Organisms Test - 65

Score

-

Rank

-

SHARING IS CARING

Question 1

Their burrows make the soil loose.

They make the soil porous, leave their castings and take organic debris in the soil.

They are used as fish meal.

They kill the birds due to biomagnification of chlorinated hydrocarbons.

Solution

Question 2

Diurnal and herbivorous

Nocturnal and carnivorous

Diurnal and omnivorous

Nocturnal and omnivorous

Solution

Question 3

Flatworms have a true coelom.

Fishes are radially symmetrical.

Birds are cold-blooded animals.

Body of earthworm is segmented.

Solution

Question 4

Destroying harmful bacteria

Destroying harmful insects

Making soil porous and loose

Both A and B

Solution

Question 5

Eudrilus eugeniae

Eisenia fetida

Perionyx excavatus

Pheretima posthuma

Solution

Question 6

Three layers of germ cells

No coelom

Flattened body

All of the above features

Solution

Question 7

Abdomen

Thorax

Head

Limbs

Solution

Question 8

Annelida

Mollusca

Cnidaria

Echinodermata

Solution

Echinoderms are exclusively marine invertebrate, having some interesting features. Their life cycle is usually complex. In most echinoderms, the embryo develops into a planktonic larva with a bilateral symmetry, that attains a pentaradial symmetry in the adult stage.

So, the correct answer is option D.

Question 9

Platypus

Whale

Seal

All of the above

Solution

Question 10

Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears

Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca

Fresh water animals with bony endoskeleton, air-bladder to regulate buoyancy

Marine animals with cartilaginous endoskeleton, body covered with placoid scales

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.