Q: The eyes of all vertebrates possess a single one of these structures? Choices: - vessel - sty - stalk - lens A:
lens

(Question)
Q: What is cholera? Choices: - protein - energy - glucose - bacteria A:
(Answer)
bacteria

Ques: Q: Scientists did not actually see viruses until what was invented? Choices: - magnifying glass - electronic scale - telescope - electron microscope A:
Ans: electron microscope

(Q).
Q: An allele is an alternative form of what structure? Choices: - amino acid - enzyme - protein - gene A:
(A).
gene

Ques:Q: Structural rearrangements of what include partial duplications, deletions, inversions, and translocations; duplications and deletions often produce offspring that survive but exhibit physical and mental abnormalities? Choices: - neutrons - phenotypes - cells - chromosomes A:

Ans:chromosomes

Ques: Q: An obstacle or opening that is shorter than the wavelength causes greater diffraction of what? Choices: - tides - ranges - particles - waves A:
Ans:
waves