The locomotory organs of Echinodermata are (a) tube feet (b) muscular feet (c) jointed legs (d) parapodia

Ans. C-  Echinodermata.

(b) Echinodermata 

(a) Arthropoda 

(b) Coelenterata 

(a) Echinodermata

(d) Skeletal muscles contract and pull the tendon to move the bones

Analogous organs are those organs which have different structural designs and origin but perform similar functions. Homologous organs are those which have the same basic structural design and origin but perform...

( c) urethra

The correct answer is (b) 10√2 cm Explanation:  When the tube is inclined, the vertical rise remains the same. So the water in the inclined tube rises to 10*sec45° =10√2 cm.