Cell Structure and Functions — Science STD 8 — Question

Name the endocrine gland attached to the base of brain.

Boojho has seen children competing with one another in moving a rubber tyre or a ring by pushing it. Why does the speed of tyre or ring increase whenever it is pushed ?

State whether human beings reproduce by sexual methods or asexual methods.

Name the metal which is usually electroplated on car parts such as bumpers and bicycle handlebars made of steel.

Fill in the following blanks with suitable words: Rd Data Book contains a record of_________ species.

What causes the red colour in tomatoes?

Which effect of electric current is utilized when a thin layer of chromium metal is deposited on an iron tap? What is this process known as?

What is formed when two gametes involved?

What is the difference between the burning of a candle and the burning of a fuel like coal?

Name two animals which can hear ultrasonic sounds.