Question
Write any four characteristics of class, ‘Aves’.
✓
Answer
- Body is covered by feathers and they can fly except a few like ostrich.
- Jaws are modified into beaks and teeth are absent.
- Endoskeleton is bony and bones are pneumatic (with air cavities).
- Forelimbs are modified into wings and covered by feathers; hindlimbs have scales and are modified for walking, perching, swimming, etc.
- Digestive tract has two additional chambers, crop and gizzard.
- Heart is four chambered and there is double circulation.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Differentiate between pulmonary circulation and systemic circulation.
Examine the figure.
-
Is this structure present in animal cell or plant cell?
-
Can these be passed on to the progeny? How?
-
Name the metabolic processes taking place in the places marked (1) and (2).
Write the types of following structures in mammals:
- Kidneys
- Fertilisation
- RBCS
- Brain
- Parental care
- Sexual dimorphism
Explain with examples the categories determined on the basis of nitrogenous excreting substances.
List the various types of nephridia in earthworm. Briefly describe the functioning of nephridia during excretion.
Organ systems in different groups of animals exhibit various patterns of complexities. Explain.
Explain the three types of cell junctions.
Draw a neat diagram of a typical leaf and label any six parts.
Briefly describe the external structure of the human heart by drawing a diagram.
Find out and make a list of proteins used as therapeutic agents. Find other applications of proteins (e.g., Cosmetics etc.)