In a semester-long experiment tracking growth in plants, your lab partner—who often skips class—carefully records the mass of water added to a potted plant with the expectation that this addition will be fully accounted for in the mass gained by the plant. Is your lab partner right or wrong? Explain.

Video transcript

Hi, everyone. Our next question says which of the following will have an effect on plant growth. Well, here, it's important to note that our question says an effect. So it's not the most effect or the major effect, it's an effect. And we notice that when we look at our answer, choices, uh choice D says all of the above. So we have the possibility that all these answers are correct when we think about plant growth. Um We recall that about 95% of a plant's wheat is made up of carbon, hydrogen and oxygen. And the sources of those three elements are carbon dioxide and water. So as we look at our answer, choices, we can see that choice, a water and choice B carbon dioxide will both be correct. So again, in a test situation, I would choose choice D all of the above since I've already got more than one correct answer, but I'm going to be thorough here. We'll look at choice C choice C is nitrogen. Um Although nitrogen isn't one of those 95% it is a macro required in large quantities for the plant to grow. And so it does have an effect on plant growth. It's a limiting nutrient. If the plant can't access enough nitrogen, it will not grow any further. So definitely has an effect on plant growth. So indeed, our correct answer is choice d all of the above. See you in the next video.