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