1. Choose correct option
A. Which of the following belongs to a
minor phylum?
a. Comb jelly b. Jelly fish
c. Herdmania d. Salpa
B. Select the animal having venous heart.
a. Crocodile b. Salamander
c. Rohu
d. toad
C. In Ascaris,
a. mesoglea is present
b. endoderm is a discontinuous layer
c. mesoderm is present in patches
d. body cavity is absent
D. Which of the following is incorrect in
case of birds?
a. Presence of teeth
b. Presence of scales
c. Nucleated RBCs
d. Hollow bones
E. Chitinous exoskeleton is a characteristic
a. Dentalium
c. Millipede
b. Antedon
d. Sea urchin
Answers
Answer:
A-a.Comb jelly B-d. toad C-a. mesoglea is present D-a. presence of teeth E-b. Antedon
A. The right choice for this answer will be - Option A : Comb Jelly.
Reason : The phylum of Comb Jelly is Ctenophora. Jelly Fish falls under the phylum Cnidaria. Herdmania and Salpa under the Chordates. So, among all these phylums, ctenophora is the phylum which is minor.
B. Toad is the right choice of this option.
Reason : In the system of venous heart, the venacava as well as veins are situated imaginary which carries deoxygenated type of blood.
C. The right option is C : mesoderm is present in patches.
D. Presence of teeth is the right answer.
Reason : Birds do not have teeth. They possesses beaks.
E. Millipede is the right answer.
Reason : Arthopod has exoskeleton made of chitin and millipede is an example of Arthopod.