How many of a squid an earthworm a human a cockroach and a bacterium have a brain?
A squid a human and a cockroach have a brain.
Do earthworms have a brain?
No earthworms do not have a brain.
How many of the creatures listed have a centralized nervous system?
A squid a human and a cockroach have a centralized nervous system.
What is the difference between a brain and a centralized nervous system?
A brain is an organ that is part of the centralized nervous system.
The centralized nervous system also contains the spinal cord.
Which creature on the list has the largest brain in proportion to its body?
A human has the largest brain in proportion to its body.
Which creature has the smallest brain in proportion to its body?
A bacterium has the smallest brain in proportion to its body.
Which creature has the largest number of neurons in its brain?
A human has the largest number of neurons in its brain.
Which creature has the smallest number of neurons in its brain?
A bacterium has the smallest number of neurons in its brain.
Which creature has the longest lifespan?
A human has the longest lifespan.
Which creature has the shortest lifespan?
A bacterium has the shortest lifespan.
Which creature can fly?
A cockroach can fly.
Which creature can swim?
A squid can swim.
Which creature breathes through gills?
A squid breathes through gills.
Which creature breathes through lungs?
A human breathes through lungs.
Which creature breathes through spiracles?
A cockroach breathes through spiracles.
