Free Diversity in Living Organisms 03 Practice Test - 9th Grade 

Question 1

Thallophytes are devoid of conducting tissues.

A.

True

B.

False

SOLUTION

Solution : A

Thallophyta is the most primitive plants. They have an undifferentiated body and thay lack specialised organs and conducting tissues. They mostly comprise soft tissues and lack mechanical tissues.

Question 2

Four chambered heart is found in

A.

Rat

B.

Chameleon

C.

Tortoise

D.

Crocodile

SOLUTION

Solution : A and D

Chameleon, tortoise and  crocodiles are all reptiles. While most reptiles have a three-chambered heart, the crocodile has a four-chambered heart. Rat is a mammal with four-chambered heart.

Question 3

Which of the following class of Animalia have hair on their skin?

A. Reptilia
B. Aves
C. Mammalia
D. Amphibia

SOLUTION

Solution : C

All mammals have hair or fur. Mammals are the only animals with true hair. Hair is made up of dead cells which contains a substance called keratin. Example: Fingernails are made of keratin. Even mammals that swim under the water (like dolphins and whales) have fine hair around their snout. Hair like structures on a fly or a spider actually contains living cells. That means if you cut a spider's hair it would hurt.

Question 4

The mode of nutrition of all organisms belonging to kingdom Monera is autotrophic.

A. True
B. False

SOLUTION

Solution : B

Some organisms belonging to kingdom Monera have autotrophic mode of nutrition, while others are heterotrophic. Cyanobacteria which belongs to kingdom Monera are capable of photosynthesis and are autotrophic. At the same time, there are certain type of bacteria which are heterotrophic and belongs to kingdom Monera.

Question 5

Liver flukes belong to the phylum ___.

A. Porifera
B. Coelenterata
C. Platyhelminthes
D. Nematoda

SOLUTION

Solution : C

Organisms belonging to the phylum Platyhelminthes have dorsoventrally flattened body. Hence, they are commonly known as flatworms. Organisms like planaria, liver fluke, etc., belong to this phylum.

Question 6

Cyanobacteria belongs to which of the following kingdom?

A. Monera
B. Protista
C. Fungi
D. Plantae

SOLUTION

Solution : A

Cyanobacteria or blue-green algae are a group of prokaryotes, which have chlorophyll and can carry out their own photosynthesis. They belong to kingdom Monera. Monera consists of organisms that do not have a defined nucleus or organelles.

Question 7

Choose the names of organisms that fall under phylum Porifera.

A. Spongilla
B. Sycon
C. Euplectelea
D. Hydra

SOLUTION

Solution : A, B, and C

Porifera means organisms with holes. They are commonly known as sponges. Features of phylum Porifera are following.

  1. Non-motile, multicellular organisms with the hard outer skeleton.
  2. They have a porous body.
  3. Pores on the bodies create a canal system which helps in circulation of substances.
  4. Not differentiated into head and tail; don’t have a well-developed organ or organ system.
  5. Mainly found in marine habitats.
Examples: Euplectelea, spongilla, sycon

Question 8

The green colour pigment present in plant cells, which helps in photosynthesis is___.

A. chlorophyll
B. xanthophyll
C. carotene 
D. keratin

SOLUTION

Solution : A

Chlorophyll is a green-coloured pigment present in the chloroplasts of plant cells. It helps in absorbing light energy, which is highly crucial for photosynthesis.

Question 9

Conducting tissues are found in

A. Thallophyta
B. Bryophyta
C. Pteridophyta
D. Angiosperms

SOLUTION

Solution : C and D

In plants, conducting tissues are found in Pteridophyta, Gymnosperms and Angiosperms. Thallophyta, Bryophyta and Pteridophyta are divisions of Cryptogamae whereas, Gymnosperms and Angiosperms are the divisions of Phanerogamae. Thallophyta and Bryophyta are more primitive as compared to Pteridophyta and they do not have conducting tissues.

Question 10

Choose the names of the organisms that fall under class 'Pisces'.

A. Shark
B. Pomfret
C. Octopus
D. Rohu

SOLUTION

Solution : A, B, and D

Pisces include cold-blooded, aquatic animals, having a streamlined body and paired or unpaired fins which are used for swimming. Their exoskeleton is in the form of scales, while endoskeleton may be cartilaginous or bony. E.g. Shark, pomfret, rohu. Octopus belongs to the Phylum Mollusca.
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