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Why the caudal fin in bony fishes is called as homocercal type?
This is because caudal fin has equal lobes.
This is because caudal fin has equal lobes.
See lessWhy the heart of fishes is commonly called the venous heart'?
This is because it supplies deoxygenated blood to gills for oxygenation.
This is because it supplies deoxygenated blood to
See lessgills for oxygenation.
Why is lateral line sensory system present in Pisces?
It is used by fishes to note the changes in surrounding water.
It is used by fishes to note the changes in
See lesssurrounding water.
How many living species are present in class – Reptilia?
About 6000.
About 6000.
See lessWhich amphibians show branchial (gills) respiration?
Young ones of most of the amphibians which are aquatic show branchial respiration.
Young ones of most of the amphibians which are
See lessaquatic show branchial respiration.
In which fishes cartilaginous skeleton is present?
Chondrichthyes.
Chondrichthyes.
See lessWrite few common features of all the vertebrates.
Few common features of all vertebrates are (i) Organ system organisation. (ii) Bilateral symmetry. (iii) Triploblastic germ layers. (Any two)
Few common features of all vertebrates are
See less(i) Organ system organisation.
(ii) Bilateral symmetry.
(iii) Triploblastic germ layers. (Any two)
Write the example of urochordates.
Herdmania, Salpa. Doliolum, Ascidia, Oikopleura. etc.
Herdmania, Salpa. Doliolum, Ascidia, Oikopleura. etc.
See lessWrite the scientific name of a flightless bird and an oviparous mammal.
Struthio (ostrich-a flightless bird) and Ornithorhynchus (platypus-an egg laying mammal).
Struthio (ostrich-a flightless bird) and Ornithorhynchus
See less(platypus-an egg laying mammal).
Write two unique features of mammals.
Mammals are unique due to following features (i) Presence of milk producing mammary glands in females. (ii) Hairs present on the whole body.
Mammals are unique due to following features
See less(i) Presence of milk producing mammary glands in females.
(ii) Hairs present on the whole body.