Mycoplasma and Ureaplasma differ from other bacteria because they naturally lack a ________.
Fill in the blank(s) with the appropriate word(s).
cell wall
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Based on hierarchical classifications and features, which statement about humans is true?
a. Humans are deuterostomes. b. Humans are acoelomates. c. Humans are diploblasts. d. Humans are asymmetrical.
Which of the following junctions influences the
passage of ions and small molecules between cells? a. gap b. adhering c. loose d. tight e. gated
What is the most likely cause of a sampling error?
a. a malfunctioning calculator b. a poorly designed hypothesis c. very few individuals in the control group d. having both an experimental and a control group e. the researcher’s knowledge of which individuals were in the experimental group
On which of the following is natural selection based?
a. genotype b. populations c. phenotype d. alleles e. genes