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