They have different colored dewlaps
They are more aggressive
They have more testosterone and progesterone when they are babies
They have territories
All of the above
a type of tree lizard
a hormone in lizards and people
a type of lizard behavior
a chemical that is higher in women than in men
changing their hormone levels
communicating with other lizards
warming themselves in the sun
catching insects
running away from a fight
reading a book
starting a fight
sharing toys at the playground
he gives them more food
he gives them more testosterone or progesterone
he threatens to bite them
he gives them territories with lots of females