Q: Q: How many pairs of chromosomes do human have ? Choices: - 12 pairs - 31 pairs - 19 pairs - 23 pairs A:
A: 23 pairs

Q: Q: The magnet field of earth is called what? Choices: - atmosphere - troposphere - ionosphere - magnetosphere A:
A: magnetosphere

Q: Q: What is the division of the body into multiple parts called? Choices: - compression - transverse - organ-level organization - segmentation A:
A: segmentation

Q: Q: In the lens makers' equation, diverging lenses and virtual images are associated with what kinds of numbers? Choices: - positive numbers - variable numbers - fractional numbers - negative numbers A:
A: negative numbers