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