9th Class Biology Textbook AP. We covered all the 9th Class Biology Textbook AP MCQs in this post for free so that you can practice well for the exam.
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9th Class Biology Textbook AP Objective for Students
Only male frogs produce croaking sounds because:
(a) Female frogs have no larynx.
(b) Female frogs have a larynx but no vocal cords.
(c) Male frogs have three pairs of vocal cords.
(d) Male frogs can magnify their voice with the help of a soundbox.
Option a – Female frogs have no larynx
Which of the following creatures is oviparous?
(a) Frog
(b) Rabbit
(c) Mouse
(d) Squirrel
Option a – Frog
The release of which one of the following in ponds and wells helps in controlling mosquitoes?
(a) Crab
(b) Dogfish
(c) Gambusia fish
(d) Snail
Option c – Gambusia fish
Which one of the following is a true fish according to the biological system of classification?
(a) Silverfish
(b) Jellyfish
(c) Cuttlefish
(d) Flying fish
Option d – Flying fish
Which statement is incorrect for animals belonging to the class Chondrichthyes?
(a) The presence of placoid scales.
(b) The absence of an air bladder.
(c) The presence of a cartilaginous endoskeleton.
(d) The notochord is persistent only at the larval stage, after which it disappears.
Option d – The notochord is persistent only at the larval stage, after which it disappears
Chondrichthyes is characterized by:
(a) Placoid scales.
(b) Ventral mouth.
(c) Ctenoid scales and a ventral mouth.
(d) Placoid scales and a ventral mouth.
Option d – Placoid scales and a ventral mouth
How many gills are present in Osteichthyes?
(a) 2 pairs
(b) 6 pairs
(c) 5 pairs
(d) 4 pairs
Option d – 4 pairs
Which of the following animals has a three-chambered heart?
(a) Scoliodon
(b) Salamander
(c) Pigeon
(d) Human being
Option b – Salamander
We covered all the 9th class biology textbook AP MCQs above in this post for free so that you can practice well for the exam.
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