Diversity in Living Organisms Test

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Diversity in Living Organisms Test - 67

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Weekly Quiz Competition

Question 1
1 / -0

Choose the correct answers from the alternatives given.
Which one of the following is not true about prokaryotes?

A
They are living cells

B
They lack a nucleus

C
They are either archaebacteria or eubacteria

D
All are heterotrophic

Solution

Prokaryotes are unicellular organisms that do not possess a proper nucleus. They lack nuclear membrane and organelles. They are living organisms and can be classified into 2 - Archaebacteria and Eubacteria. Some prokaryotes like blue green algae can make their own food and are autotrophs.
Hence the correct option is D.
Question 2
1 / -0

Fruits are not formed in gymnosperms because:

A
They are seedless.

B
They are not pollinated.

C
The process of fertilization does not occur.

D
They have no ovary.

Solution

In angiosperms, after fertilization, the ovary present in the flower develops into a fruit. In gymnosperms, there is no ovary present. Therefore, fruits are not formed in gymnosperms.
The ovules (future seeds) are located directly on the surface of the flower.
So, the correct answer is option D.
Question 3
1 / -0

Choose the correct answers from the alternatives given.
Which of the following characteristics is not found in the amphibians?

A
Thin moist skin

B
Internal fertilization

C
Aquatic larvae

D
Egg with gelatinous covering

Solution

Amphibians are cold-blooded animals, meaning they do not have a constant body temperature but instead take on the temperature of their environment. They have moist, scaleless skin that absorbs water and oxygen. They fertilize their eggs outside of the female's body where the male and female release their gametes. Most amphibians lay their eggs, protected only by jelly, in the water. The young go through a larval stage, breathing through gills and swimming with fins, before transforming into adults.
So the correct answer is "internal fertilization".
Question 4
1 / -0

Which of the following is not a characteristic of the phylum Annelida?

A
Hydrostatic skeleton

B
Segmentation

C
Pseudocoelom

D
Closed circulatory system

Solution

Pseudocoelom is a false body cavity that is not lined with mesodermal cells. It is found in organisms such as nematodes. Coelom in annelids is schizocoelom that develops from a split in the mesoderm. Therefore, pseudocoelom is not a characteristic of Annelida.
So, the correct option is 'Pseudocoelom'.
Question 5
1 / -0

Which of the following characteristics first developed in reptiles ?

A
Amniotic eggs

B
Scales on skin

C
Four-legged body

D
Skull and vertebral column

Solution

Reptiles and birds are amniote animals, which means that the eggs laid by females contain an elastic sac within which the embryo develops. But, reptiles are primitive than birds; so they developed the characteristic of amniotic eggs first.
So, the correct answer is option A.
Question 6
1 / -0

Choose the correct answers from the alternatives given.
Ascaris is a parasitic:

A
roundworm

B
flatworm

C
tapeworm

D
sponge

Solution

Ascaris is a genus of parasitic nematode worms known as roundworm. They are non-segmented worms with elongate cylindrical bodies.
So, the correct option is 'roundworm'.
Question 7
1 / -0

In the kingdom Animalia, which of the following is not an invertebrate?

A
Platyhelminthes

B
Echinodermata

C
Arthropoda

D
Amphibia

Solution

Vertebrates are animals that have a backbone or vertebral column. These animals include Cyclostomata, Pisces, Amphibia, Reptilia, Aves and Mammalia. Vertebrates are classified under the category of Vertebrata. Any organism classified outside Vertebrata is an invertebrate.
So, the correct option is 'D'.
Question 8
1 / -0

Choose the correct answers from the alternatives given.
A four-chambered heart is characteristic of:

A
bony fish

B
mammals

C
amphibians

D
none of these

Solution

Fishes and amphibians have two and three-chambered heart respectively and mammals have a four-chambered heart.
So, the correct option is, 'mammals'.
Question 9
1 / -0

Choose the correct answer from the given alternatives.
Unlike placental mammals, both monotremes and marsupials:

A
Lack nipples

B
Have some embryonic development outside the mother's uterus

C
Lay eggs

D
Are found in Australia and Africa

Solution

A marsupial is a mammal that raises its newborn offspring inside an external pouch at the front or underside of their bodies. Monotremes are are mammals that lay eggs outside the body of the female.
In contrast, a placental is a mammal that completes embryo development inside the mother, nourished by an organ called the placenta.
So the correct answer is "have some embryonic development outside the mother's uterus".
Question 10
1 / -0

Choose the correct answers from the alternatives given.
In sheer numbers and distribution, which of the following groups of animal are the most successful:

A
arthropods

B
snails and clams

C
vertebrates

D
sponges

Solution

The Phylum Arthropoda is the most successful group of animals on earth. It is thought 75-90 % of all known living and fossil organisms (estimated at over 1 million species), are arthropods. Arthropods are a phylum within the animal kingdom. They include four classes: Chelicerates (such as spiders, mites, ticks, scorpions, and horseshoe crabs), the extinct Trilobites, Crustaceans (such as lobsters, crabs, and shrimp), and Uniramians (millipedes, centipedes, and the most numerous group of all, the insects).
So, the correct option is, 'arthropods'.

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Re-Attempt Weekly Quiz Competition

Diversity in Living Organisms Test - 67

Result

Diversity in Living Organisms Test - 67

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Rank

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SHARING IS CARING

Question 1

They are living cells

They lack a nucleus

They are either archaebacteria or eubacteria

All are heterotrophic

Solution

Question 2

They are seedless.

They are not pollinated.

The process of fertilization does not occur.

They have no ovary.

Solution

Question 3

Thin moist skin

Internal fertilization

Aquatic larvae

Egg with gelatinous covering

Solution

Question 4

Hydrostatic skeleton

Segmentation

Pseudocoelom

Closed circulatory system

Solution

Question 5

Amniotic eggs

Scales on skin

Four-legged body

Skull and vertebral column

Solution

Question 6

roundworm

flatworm

tapeworm

sponge

Solution

Question 7

Platyhelminthes

Echinodermata

Arthropoda

Amphibia

Solution

Question 8

bony fish

mammals

amphibians

none of these

Solution

Question 9

Lack nipples

Have some embryonic development outside the mother's uterus

Lay eggs

Are found in Australia and Africa

Solution

Question 10

arthropods

snails and clams

vertebrates

sponges

Solution

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