Fill in the blank
Migratory birds fly to far away places because of ……….changes.

Fill in the blanks A bird flying in the sky posseses _____motion.

Migratory birds fly to far away areas during a particular time of a year. Which of the following conditions present in their habitat during that time are responsible for this behaviour? (i) Unavailability of food. (ii) Extreme weather conditions. (iii) Over crowding. iv) Lack of nesting areas.

Fill In the blanks: __ is the energy which a body possess because of its motion.

Fill in the blanks The transfer of heat which takes place due to the vibration of particles is _______.

Fill in the blank in Night birds have ______ cones than rods in their eyes.

Fill in the blanks : Plants are called as ............because they can fix carbon dioxide .