(Question)
Q: What do you call a group of cells of the same kind that performs the same function? Choices: - nucleus - molecule - organ system - tissue A:
(Answer)
tissue

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

(Question)
Q: What is said to occur when both traits appear in a heterozygous offspring? Choices: - identical twins - pollenation - xenophobia - codominance A:
(Answer)
codominance