Q: What is it called when breaks in bone occur that is usually caused by excessive stress on the bone? Choices: - fragments - faults - ruptures - fractures A:
fractures
------
Q: Nonvascular plants such as liverworts, hornworts, and mosses lack what three typical plant features? Choices: - chloroplasts, stems, flowers - flowers, leaves, bark - roots, leaves, chloroplasts - roots, stems, leaves A:
roots, stems, leaves
------
Q: Echinoderms lack what type of system that in humans consists of the brain and spinal cord? Choices: - autonomic system - endocrine system - peripheral nervous system - centralized nervous system A:
centralized nervous system
------
Q: What are the contacts between neurons called? Choices: - neurapses - impulses - electrodes - synapses A:
synapses
------