Biology Exam 2021
Which of the following is a valid hypothesis for why a plant appears to be dying?
A. The plant is not being watered enough. B. The plant is being watered too much C. The plant is receiving too much sunlight. D. All of the above.
The work of scientists usually begins with...
careful observations
Information gathered from observing a plant grow 3 cm over a two-week period results in
data.
Which of the following variables present in Redi's experiment on spontaneous generation is NOT a controlled variable?
gauze covering that keeps flies away from meat
Hypotheses may arise from
prior knowledge, logical inferences, and informed, creative imagination
A well-tested explanation that unifies a broad range of observations and incorporates durable, well-supported hypotheses is a(an)
theory.
Which of the following is NOT a goal of science? Selected:
to use data to support a particular point of view
A number of rats are divided into two groups: One group is fed a normal diet, whereas the other group is fed the same diet but with one necessary mineral left out. The weight of the rats were monitored over a five week period. The animals receiving the normal diet remained healthy; those in the other group grew weaker. Write a research question for this experiment and also identify the independent variable, dependent variable and the control group in this experiment.
Control Group= The normal diet group.Independent= The change in diets. (Normal diet or the one with a mineral left out)Dependent= The weight of the rats.Will taking out a mineral in a rats food make a rat lose weight and become weaker or will it make the rats stronger?
The variable that is deliberately changed is called the dependent variable.
False
Describe with detail 3 parts of the scientific inquiry model you used to investigate bacterial growth on agar plates.
Observation= I used this by observing how much bacterial growth grows over a couple days.State question= I asked the question "Will the soap dispenser or door handle grow more bacterial growth. Throughout the experiment, I looked back on this question analyzing my results.State expectations/Hypothesis= I made my hypothesis about some prior knowledge I knew. I know when people have dirty hands they go to the sink and touch the soap dispenser to clean their dirty hands, resulting in the soap dispenser with the dirty bacteria on the persons hands.
A controlled experiment allows the scientist to isolate and test
a single variable.
