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