Prepare for NEET Biology Animal Kingdom (Aves) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert help to understand feathers, flight adaptations, and air sacs in birds.
The uropygial gland in birds secretes an oily substance. This secretion primarily aids in:
Maintaining feather integrity and waterproofing
Attracting mates during courtship displays
Thermoregulation by reducing heat loss
Producing antimicrobial compounds for defense
Which of the following combinations of skeletal adaptations is NOT found in birds adapted for sustained flight?
Pneumatic bones, fused vertebrae, and a keeled sternum
Reduced skull bones, fused clavicles (furcula), and a synsacrum
Solid bones, unfused vertebrae, and a short pygostyle
Elongated forelimbs, reduced digits, and a flexible neck
The unique respiratory system of birds, with its air sacs and unidirectional airflow, primarily allows for:
Vocalization through the syrinx
Efficient oxygen extraction even at high altitudes
Buoyancy control during flight
Rapid heat dissipation during strenuous activity
In birds, the pectoralis muscles are responsible for the _____, while the supracoracoideus muscles are responsible for the _____.
upstroke; downstroke
downstroke; upstroke
forward flight; hovering
gliding; flapping
Which adaptation in avian digestive systems is specifically related to their lack of teeth?
A long, coiled small intestine for nutrient absorption
The presence of a crop for temporary food storage
The presence of a gizzard for mechanical digestion
A two-chambered stomach for chemical digestion
The following characteristics are observed in a newly discovered bird species: highly developed olfactory lobes, nocturnal habits, and a diet primarily consisting of fruit. Which of the following is MOST likely true about this species?
It has a highly developed syrinx for complex vocalizations.
It relies heavily on its sense of smell for foraging and navigation.
It likely exhibits strong migratory behavior.
It has a high visual acuity for hunting prey.
Which of the following is NOT a characteristic feature of Aves?
Feathers
Hollow bones
Three-chambered heart
Beak
The bones of birds are pneumatic, meaning they are:
Solid and dense
Filled with air
Made of cartilage
Filled with marrow
What is the primary function of feathers in birds?
Camouflage only
Flight and insulation
Attracting mates only
Producing sound
