Biology, 06.10.2019 20:00 halimomohamed
For his science project, austin wants to determine if the ph of standing rainwater changes over time. he collects a jar of rainwater and places it indoors in a spot that does not receive a lot of sunlight to limit evaporation. using a ph testing kit, he measures the ph of the water once a day for 20 days.
what is the independent, or manipulated, variable in austin’s experiment?
a. the number of days the rainwater is allowed to sit
b. the number of times the rainwater is observed
c. the change in the amount of rainwater due to evaporation
d. the change in ph of the rainwater over time
Answers: 1
Biology, 22.06.2019 05:30
Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.
Answers: 1
Biology, 22.06.2019 13:00
Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.
Answers: 1
For his science project, austin wants to determine if the ph of standing rainwater changes over time...
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