(Question)
Q: What runs through the penis and opens to the outside at the tip of the penis? Choices: - fallopian tube - prostate gland - vas deferens - the urethra A:
(Answer)
the urethra

(Question)
Q: What has atoms with unstable nuclei? Choices: - hydrocarbon - microwaves - radionuclide - radioisotope A:
(Answer)
radioisotope

(Question)
Q: Iridescent green beetles, known as jewel beetles, change color because of the light-reflecting properties of the cells that make up this? Choices: - their hairs - their wings - their scales - their external skeleton A:
(Answer)
their external skeleton