Test: Nonchordates Coelomates


10 Questions MCQ Test Science Class 9 | Test: Nonchordates Coelomates


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QUESTION: 1

Which of the following character can be seen in housefly, spider, butterfly and cockroach?

Solution:

Jointed appendages is a common feature of Phylum Arthropoda, and the mentioned animals belong to the phylum Arthropoda.

QUESTION: 2

Which of the following organism shows the presence of jointed appendages?

Solution:
QUESTION: 3

Skin is kept moist in earthworms. It helps in

Solution:

Skin in earthworms is kept moist because of the process of respiration. Respiration in earthworms can happen only by means of diffusion which transfers molecules from areas of higher concentration to areas of low concentration.

QUESTION: 4

Which of the following is a member of Phylum Echinodermata?

Solution:
QUESTION: 5

Who proposed artificial system of classification

Solution:
QUESTION: 6

Which phylum has a reduced coelomic cavity?

Solution:
A coelom is a hollow, fluid-filled cavity found in many living things, where it acts as a protective cushion for their internal organs. In some animals, such as worms, the coelom acts as a skeleton. The coelom also allows the internal organs to move and grow independently of the outer layer of the body wall.
Now we see what is phylum...in simple words we can define it that a phylum is a level of classification or taxonomic rank below Kingdom and above Class. There are 36 recognized animal phyla, of which but nine contain the vast majority of described, extant species.and Mollusca is one of them.
If we focus on the some basic features of Mollusca...then.
Some common features are :
▪Unsegmented soft body with bilateral symmetry.
▪Presence of an internal or external shell.
▪A toothed tongue (made mostly of chitin) called the radula.
▪A mantle which is a fold in the body wall that lines the shell.
▪Muscular foot (and/or tentacles in some).
●Here we see it has presence of external and internal shell....which leads to reduce the coelomic cavity..
QUESTION: 7

Mosquito belongs to the phylum

Solution:

Mosquitos are triploblastic, segmented and have jointed appendages and thus belong to Phylum Arthropoda.

QUESTION: 8

Pick the odd one out:

Solution:
QUESTION: 9

What does Mollusca mean?

Solution:
QUESTION: 10

Which of the following animal does not belong to phylum Echinodermata?

Solution:

Chiton belongs to the phylum mollusca.
So, Chiton cannot belong to the phylum Echinodermata.

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