starting a fight
running away from a fight
reading a book
sharing toys at the playground
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
communicating with other lizards
changing their hormone levels
warming themselves in the sun
catching insects
They have more testosterone and progesterone when they are babies
All of the above
They are more aggressive
They have territories
They have different colored dewlaps
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