Seedlings of the parasitic plant Cuscuta pentagona (dodder) hunt by directing growth preferentially toward nearby host...

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Seedlings of the parasitic plant Cuscuta pentagona (dodder) huntby directing growth preferentially toward nearby host plants. Toinvestigate the possibility that the parasite detects volatilechemicals produced by host plants, a researcher placed individualdodder seedlings into a vial of water at the center of a circularpaper disc. A chamber containing volatile extracts from tomato (ahost plant) was placed at one edge of the disc, whereas a controlchamber containing only solvent was placed at the opposite end. Theresearcher divided the disk in to 4, equal-area quadrats to recordwhich direction the seedlings grew. 30 dodder plants were tested,and 17 grew toward the volatiles, 2 grew away from the volatiles(toward the solvent), 7 grew toward the left quadrant, and 4 grewtoward the right quadrant.
1) Is this an experimental or observational study?
2) State null and alternative hypothesis
3) Which test is appropriate for this study? T-test, contingencytest or goodness of fit?

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Solution1 Experimental study2State the hypotheses The first step is tostate the null hypothesis and an alternative hypothesisNull hypothesis The proportion of grown seedling are same forthe four parts in the diskAlternative hypothesis At least one of the See Answer

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