Pasteur's experiment with the swan-necked flask rejected the spontaneous generation hypothesis by demonstrating that...
What will be an ideal response?
Cells can grow only in broth that was exposed to a source of preexisting microorganisms
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In one set of experiments, Calvin Bridges crossed white-eyed female fruit flies with red-eyed males. Some of the offspring were white-eyed females. These individuals, he demonstrated, had the genotype _____, which occurred because of _____ during meiosis
A. XXX / nondisjunction B. XXO / independent assortment C. XXY / random segregation D. XXO / nondisjunction E. XXY / nondisjunction
Which term describes soil with roughly equal proportions of sand, silt, and clay?
a. humus b. loam c. topsoil d. A horizon e. B horizon
During oogenesis, cells divide unequally into a large functional oocyte and a small
____________________. Fill in the blank(s) with the appropriate word(s).
Experiments on competition among species within a community reveal that
A) removing a group of species has relatively little effect on a community. B) removing a single species has a stronger effect than removing a group of species from a community. C) removing a group of species has a stronger effect than removing a single species from a community. D) removing a single species has relatively little effect on a community.