Two students were testing the amount of fertilizer that would best promote the growth

of strawberries in a garden. Which of the following could be an unavoidable source of experimental error?
A. length of the study
B. variation in the strawberry plants
C. the cost of watering the plants
D. fertilization during the study

c.fruit weight

b.amount of water
a.gravity
c.the stem moves toward the light for better photosynthesis
100%

A student is studying the effect of fertilizer on fruit growth. He uses 6 tomato plants, placing each in a garden where they get equal amounts of sun and water. One plant is given no fertilizer, while the other 5 plants are given 5, 10, 15, 20, and 25 grams of dissolved fertilizer each day for 3 weeks. At the end of the experiment the tomato fruits are weighed.

What is the dependent variable in this experiment?

A. amount of fertilizer

B. sun exposure

C. fruit weight

D. amount of water

B. is the only one that make sense to me.

*makes

Its DDBA

thx random is 100% correct (^///^)(●'◡'●):-P

To identify the unavoidable source of experimental error in this scenario, we need to understand the nature of the experiment. The students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden.

A. Length of the study: The length of the study refers to the duration for which the experiment is conducted. While the duration of the study could potentially impact the growth of the strawberries, it is not an unavoidable source of error because the students have control over the study duration.

B. Variation in the strawberry plants: Variation in the strawberry plants refers to the differences that naturally occur among the plants used in the experiment. This variation can affect the experimental results and is a potential source of error. However, it may be possible for the students to minimize this variation by using plants of the same variety, age, and health condition.

C. The cost of watering the plants: The cost of watering the plants is not directly related to the experimental process and does not affect the growth of the strawberries. Therefore, it is not an unavoidable source of error.

D. Fertilization during the study: Fertilization during the study refers to the application of fertilizers to the strawberry plants as part of the experiment. This variable is directly related to the experiment and plays a crucial role in determining the growth of the strawberries. However, it is not an unavoidable source of error because the students have control over the amount and timing of the fertilization.

Based on these considerations, the most likely unavoidable source of experimental error in this scenario is B. Variation in the strawberry plants. While efforts can be made to minimize this variation, it is challenging to completely eliminate it in biological experiments.