Water Bears: How They Get the Molecules They Need

During hibernation, Water Bears stop almost completely and do not move or react to their environment—but they can come back to life as soon as conditions return to normal

• True

• False

How do water bears get oxygen?

• Through their lungs

• By absorbing it directly from water

• By eating algae and bacteria

• By inhaling oxygen from the air

What do water bears use their tube-shaped mouth for?

• To absorb oxygen

• To poke through cell membranes

• To transport matter to their cells

• To release energy through cellular respiration

How do water bears get matter to their cells?

• Through a circulatory system

• By moving body fluids through an open area

• By absorbing it directly from water

• By eating microorganisms

What do water bears need glucose and oxygen for?

• To release energy through cellular respiration

• To build their body systems

• To hibernate in extreme conditions

• To absorb nutrients from the environment

What is the main difference between water bears and humans in terms of getting molecules to their cells?

• Water bears have a circulatory system

• Humans have a simpler way of getting molecules to their cells

• Water bears have a smaller number of cells

• Humans have a more complex body structure

What is the purpose of extreme hibernation for water bears?

• To conserve energy

• To adapt to their environment

• To reproduce

• To avoid predators

What do water bears use their special squeezing muscles for?

• To move around

• To absorb oxygen

• To eat microorganisms

• To transport matter to their cells

Why do water bears and humans both need oxygen and glucose?

• To release energy through cellular respiration

• To build their body systems

• To hibernate in extreme conditions

• To absorb nutrients from the environment

Water Bears do not have a respiratory system.

• True

• False