Common characteristics found in chondrichthyes and osteichthyes
a. Streamlined body
b. four pairs of gills
c. Two-chamered heart
d. Poikilothermous (cold-blooded)
e. Dioecious (sexes are separate)
f. Internal fertilisation

Common characteristics found in between aves and mammals are a. Respiration in by lungs b. Heart if four-chambered c. Homoiothermy d. Larva is not found e. Dioecious and internal fertilisation f. Jaws are provided with teeth.

How many among following characteristics are common in betweenr eptiles and birds? a. Four-chambered heart. b. Scales c. Homoiothermous (warm-blooded) d. Dioecious and internal fertlisation e. Ovipary and direct development.

Count the number of statements which are not related to the members of class chondrichthyes:- (a) terminal mouth (b) placoid scales on skin (c) presence of air bladder (d) poikilothermal (e) internal fertilization (f) vivipary

Read the characteristics given below of a chordate: a) two-chambered heart b) poikilotherms c) exclusively marine e) oviparous with direct development e) separate sexes Which of the following possess all of the above features?

Read the characteristics given below of a chordate: a) two-chambered heart b) poikilotherms c) exclusively marine e) oviparous with direct development e) separate sexes Which of the following possess all of the above features?

Which of the following features is not related to the cockroach? (a) Body divisible into head, thorax and abdomen (b) Two pairs of wings are found (c) Three pairs of jointed legs are present on abdomen (d) Presence of anal cerci in both sexes.