Biology, 16.07.2019 13:40 kristygodwin
15 points! ! cindy hypothesizes that if she adds salt to a weak acid, then its ph will be lowered. she develops the following experiment to test her hypothesis. which of the following steps could compromise the validity of her experiment? fill two beakers with 50 ml of the same weak acid. add salt to the first beaker. add water to the second beaker. measure the ph of the solution in each beaker. a.) step 1 b.) step 2 c.) step 3 d.) step
Answers: 1
Biology, 21.06.2019 15:00
According to the theory of punctuated equilibrium, at what rate does speciation occur? species change depending on the rate of natural selection. after periods of stasis, new species evolve relatively rapidly. species change slowly and eventually form new species. some species change quickly and others change slowly to balance the overall rate.
Answers: 3
Biology, 21.06.2019 22:00
Match each description to the appropriate biome. tropical savanna desert tropical rain forest taiga tundra has sparse vegetation and very cold temperatures located near the equator and contains trees that form dense canopy layers is very hot and dry, and has plants that need little water has cold winters, heavy snowfall and is dominated by conifers has warm temperatures and is dominated by grasses
Answers: 1
15 points! ! cindy hypothesizes that if she adds salt to a weak acid, then its ph will be lowered....
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