Biology

Biology, 17.07.2019 06:28, johnsonkia873

Abiology class is conducting an experiment to determine how soil ph may affect the germination of pine seedlings. three pine seeds are placed in a pot of soil with a ph of 6.5, and three pine seeds are placed in a pot of soil with a ph of 4.0. after one week, the students count the number of seeds which have germinated and determine the mass of each pine sprout. which of these is the best way to improve the accuracy and validity of the data in this experiment? a) repeat the experiment with other types of seeds b) repeat the experiment using soils of different ph c) increase the sample size by using additional pots and seeds d) increase the number of independent variables in the experiment

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Biology, 08.07.2019 00:30, gesic2003

Can you determine which instances reflect a valid experiment or conclusion? check only those that are valid. a. a biology class is conducting an experiment to determine how soil ph affects the germination of pine seedlings. 30 pine seeds are placed in pots of soil with varying ph levels: 4.5, 6.5, 7.0, 7.5, 8.5, and 9.0. pot size, water, and light exposure were constant for all pots. b. a marine biologist is examining the effects of oil pollution on a population of seagulls (larus canus). he is particularly interested in determining whether oil pollution reduces the number of eggs that may be hatched in each seagull nest. during one breeding season, he has counted the number of eggs present in 16 seagull nests and recorded the distance from each nest to a nearby oil refinery c. after months of grueling research drinking many, many colas, karl has come to the conclusion that brand a cola tastes better than brand b cola. d. jeanette was conducting an experiment to determine if plants grow better when exposed to rap music. she bought two identical plants and exposed one to rap music for two weeks while the other grew without music. from the data, jeanette determined that plants do not grow better with rap music. e. robert is instructed in a lab experiment to first record the ambient temperature of the room. to do this, he holds the thermometer under a bright light to accurately read it. he then reads and records the data as 33°c.

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Biology, 26.07.2019 21:00, PKTHUNDER5011

Aforest fire lightly burned part of the park. the fire added nutrients to the soil. the fire also pine cones open and drop their seeds on the ground. these seeds sprouted and grew into strong, healthy seedlings. what effect did the change in the environment most likely have on the pine trees growing in the park? a) all of the pine trees died. b) the fire release the seeds that grew in the improved soil. c) new plants moved in to replace the pine trees that were there before. d) the seeds that dropped to the ground grew, but there were much fewer trees than before.

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Biology, 03.09.2019 06:20, goodperson21

Abiology class is conducting an experiment to determine how soil ph may affect the germination of pine seedlings. three pine seeds are placed in a pot of soil with a ph of 6.5, and three pine seeds are placed in a pot of soil with a ph of 4.0. after one week, the students count the number of seeds which have germinated and determine the mass of each pine sprout. which of these is the best way to improve the accuracy and validity of the data in this experiment?

Answers: 1

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Biology, 10.10.2019 21:30, elijahjacksonrp6z2o7

Can you determine which instances reflect a valid experiment or conclusion? check only those that are valid. a biology class is conducting an experiment to determine how soil ph affects the germination of pine seedlings. 30 pine seeds are placed in pots of soil with varying ph levels: 4.5, 6.5, 7.0, 7.5, 8.5, and 9.0. pot size, water, and light exposure were constant for all pots. a marine biologist is examining the effects of oil pollution on a population of seagulls (larus canus). he is particularly interested in determining whether oil pollution reduces the number of eggs that may be hatched in each seagull nest. during one breeding season, he has counted the number of eggs present in 16 seagull nests and recorded the distance from each nest to a nearby oil refinery. after months of grueling research drinking many, many colas, karl has come to the conclusion that brand a cola tastes better than brand b cola. jeanette was conducting an experiment to determine if plants grow better when exposed to rap music. she bought two identical plants and exposed one to rap music for two weeks while the other grew without music. from the data, jeanette determined that plants do not grow better with rap music. robert is instructed in a lab experiment to first record the ambient temperature of the room. to do this, he holds the thermometer under a bright light to accurately read it. he then reads and records the data as 33°c.

Answers: 2

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