Which of the following experienced global temperatures that resemble the temperatures of today?

Charles likes to play with Erector sets and LEGOs. On measures of visual-spatial ability, he outperforms his female classmates. What might this suggest?

a. Nathan, like other boys, is simply better at these tasks. b. Typical "boy" toys may provide more experience with visual-spatial tasks. c. Playing with "boy" toys enhances natural abilities. d. "Boy" toys do not encourage visual-spatial abilities any differently than "girl" toys.

Synaptic vesicles have been released from their protein anchors. What happens next?

a. The vesicles cross the synaptic gap, deliver their contents to the receptors, and dissolve into the fluid. b. The vesicles migrate to the cell membrane, spill their contents into the synaptic gap, and complete their life cycle. c. The vesicles cross the synaptic gap, enter the receiving neuron and deliver their contents to the receptors. d. The vesicles migrate to the cell membrane, spill their contents into the synaptic gap, and are refilled for later use.