CBSE Questions for Class 9 Biology Diversity In Living Organisms Quiz 17 - MCQExams.com

Correct Option: C

Explanation:

• Fasciola, sometimes known as the liver fluke, is a parasitic worm of platyhelminthes genus.
• The body of a Fasciola (flatworm) contains a single cavity with one access to the outside.
• The single opening serves as both a mouth for ingestion (food intake) and anus for egestion (undigested food is passed out).
• It's known as the blind sac plan.

Hence, Fasciola have a single opening to the outside that serves both as mouth as well as the anus.

The insect with incomplete metamorphosis have three stages in the life history : egg, naiad( young) and adult. Development with incomplete metamorphosis is known as Hemimetabolus insect.

A. Cimex- Hemimetabolus insect.

B. Musca- Holometabolus insect.

C. Anopheles- Holometabolus insect.

D. Apis-  Holometabolus insect.

So, the correct answer is 'Cimex'.

• The birds which have lost their ability to fly through evolution are called as flightless birds. 
• Flightless birds include over 60 extant species including the well-known ratites(ostrich, emu, cassowary, rhea and kiwi) ) and penguins.
• Kiwi or kiwis are flightless birds. These birds are native to New Zealand and belong to the genus Apteryx and family Apterygidae. 
• Hence Kiwi is a flightless bird.
• So, the correct answer is 'Kiwi'.

(a) Flies with fused labella have food channels in the surface of the labella. These are called pseudotracheae.

(b) Dutton describes a fine membrane covering in the area between mosquito extended tongue and the base of the labellae. 

(c) Butterflies  have mouth parts specialized for probing into a flower and sucking out nectar. A long, slender proboscis is formed by the two galea of the maxillae which interlock to enclose a central food canal.

(d) In Tse-Tse fly, a pair of maxillary palps help to protect the more delicate proboscis or haustellum which lies between them when it is not in use.

So, the correct answer is 'a and c'.

A. Aedes -Nocturnal mosquito so it form superposed image.

B. Culex- Nocturnal mosquito so it form superposed image.

C. Musca- Diural so it form apposition image.

D. Periplaneta- Nocturnal so it form superposed image.

So, the correct answer is 'Musca'.

• Rectrices in birds are the feathers that they use during flight. The tail aids the flight of birds by providing a larger surface area. They are often attached symmetrically to the last tailbone of the birds, the pygostyle. Their number varies from bird to bird. 
• The length of the rectrices determines the shape of the tail. 
• The rectrices of peacocks are concealed under powerfully developed upper tail coverts that have ocellated bluish-green spots on them. Feathers that have ocellated spots are ocellated feathers.

• Amphibian lives on both aquatic and terrestrial habitat. Thus, they have dual habitats.
• Mammals have a characteristic feature of mammary glands to feed their young ones.
• Chondrichthyes (cartilaginous fishes) have a cartilaginous notochord.
• Osteichthyes are bony fish that have a sac-like outgrowth, the swim bladder (air bladder) arising from the dorsal wall of the esophagus which is an air-filled organ used to maintain balance and to swim up and down.
• Cyclostomata have sucking and circular mouth without jaws.
• Aves have pneumatic bones. These bones are long and hollow with air cavities to reduce weight. 
• So, the correct answer is option C.