Who invented the lightning rod?

What is the name of the food ingredient derived from collagen undergone hydrolysis? Also called hydrolyzed collagen.

In addition to calcium, the lack of which element causes birds to lay eggs without shells?

What is the color of liquid oxygen?

Who is the material bearer of heredity?

What are the catalysts of reactions taking place in living organisms?

What are the changes in genes called?

Which fuel can be considered ideal from the point of view of environmental protection?

From which wood is cork extracted?

Which of the following plants does not produce vegetable oil?

Which of the following vegetables is the richest in vitamin C?

On what day do baby chicks hatch?

What protein enables oxygen to be transported in the human body?

At which of the following temperatures does iron melt?

What is the chemical name of English salt (Epsom salt)?

Which element forms the most compounds?

What do you get when you boil pork fat with caustic soda?

Which organ is supplied with the most blood?

Who first introduced the concept of positive and negative electrical charge?

Which vitamin do you associate with the pigment carotene?

LUX is a unit of measurement which describes what?

At what temperature on the Kelvin scale does water freeze?

Which of the following planets in the solar system does not have rings?

Which of the following has nothing to do with computing?