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