What organ filters waste out of the blood in fish?
A) they don't filter out the waste
B) kidney
C) spleen
D) malpighian tubules
Ans: B) kidney
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The chemical bond connecting one nucleotide with the next along one strand of a DNA molecule is called a
A. glycosidic bond. B. hydrogen bond. C. phosphate bond. D. phosphodiester bond. E. peptide bond.
How do water molds differ from true fungi?
a. Water molds have cell walls made up of chitin; fungi have cell walls made up of cellulose. b. Water molds form hyphae; fungi form mycelia. c. Water molds are haploid; fungi are diploid. d. Water molds have a flagellated stage in their life cycle; fungi do not. e. Water molds do not cause plant diseases; fungi do.
Competition shapes communities because there are usually limited
A. species. B. resources. C. interactions. D. nutrients.
After many years of testing, an hypothesis becomes accepted as a
a. problem. b. theory. c. conclusion. d. variable. e. control.