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