——— igneous rocks form below Earth's surface.
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The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

How does the carbon cycle involve an exchange of carbon