Which part of the human body contains no blood vessels?
Brain
Cornea
Liver
Skin
What animal can survive in space for a short time without protection?
Ant
Cockroach
Tardigrade
Beetle
Which metal is liquid at room temperature?
Mercury
Iron
Copper
Silver
What planet rains diamonds according to scientists?
Mars
Saturn
Venus
Mercury
How many bones do sharks have in their bodies?
50
100
0
206
Which organ can regenerate itself?
Heart
Liver
Brain
Lung
Which animal has three hearts?
Octopus
Whale
Shark
Dolphin
Which gas makes up most of Earth's atmosphere?
Oxygen
Nitrogen
Carbon Dioxide
Hydrogen
What color is the Sun actually?
Yellow
Orange
White
Red
What is the strongest muscle in the human body (by force)?
Heart
Jaw
Arm
Thigh
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