1.You have been assigned to conduct a scientific study on the effects of four ty

Question

1.You have been assigned to conduct a scientific study on the effects of four types of fertilizer on broccoli growth. You visit several broccoli farms to make observations and use these observations to find preliminary correlations and form hypotheses. To test your hypotheses, you set up five plots of broccoli - one plot for each fertilizer type plus a control plot which is not fertilized. When you meet with your professor to discuss your progress, he tells you that your project is missing an important component of the scientific method. What is missing?

___________

testing biotic factors such as herbivore abundance

replicating each fertilizer treatment in multiple plots

using more than one plant species so your conclusions can be more broadly applied

testing the fertilizer in a natural setting on wild relatives of broccoli

2.

Following the theory of optimal foraging crabs prefer to eat intermediate sized mussels, but they do occasionally eat some different size mussels. Which of the following statements about this situation is true?

small mussesl are easy to eat but provide little nutrition

very large mussels provide lots of nutrition but are much tougher to eat due to shell thickness

intermediate mussels provide the most nutrition for the least amount of effort

since all crabs prefer intermediate mussels, they are harder to find than the other sizes

all of the above are true

small mussesl are easy to eat but provide little nutrition

very large mussels provide lots of nutrition but are much tougher to eat due to shell thickness

intermediate mussels provide the most nutrition for the least amount of effort

since all crabs prefer intermediate mussels, they are harder to find than the other sizes

all of the above are true

Explanation / Answer

1. The answer is replicating each fertiliser treatment in multiple plots

When evaluating a response of fertiliser on a plant species, there should be replicates of the same experiment to prove its significance. The experiment should be repeated thrice to prove that every time you get the same response.

2. The answer is All of the above are true

What type of food to eat Should select the most profitable prey

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