Q: Sickle cell disease is caused by production of an abnormal type of what? Choices: - fat globule - thrombocyte - leukocyte - hemoglobin A:
hemoglobin

Q: Which theory states that all organisms are composed of one or more cells, the cell is the basic unit of life, and new cells arise from existing cells? Choices: - theory of evolution - microcellular theory - natural selection - unified cell theory A:
unified cell theory

Q: What occurs when hot magma transforms rock that it contacts? Choices: - existence metamorphism - form metamorphism - changing metamorphism - contact metamorphism A:
contact metamorphism

Q: The electronegativity of an element increases with increasing of what state? Choices: - isolation - evaporation - conduction - oxidation A:
oxidation