(Q).
Q: The main components of the circulatory system are the heart, blood vessels, and what else? Choices: - lungs - nerves - brain - blood A:
(A).
blood

(Q).
Q: The most common mode of asexual reproduction is through the formation of asexual these? Choices: - fibers - atoms - cells - spores A:
(A).
spores

(Q).
Q: Sounds or pictures can be encoded in pulses of what, which are then sent through an optical fiber? Choices: - kinetic energy - microwaves - quasars - laser light A:
(A).
laser light