Marine iguanas are vegetarians that feed mainly in the intertidal zone. Only lar

Question

Marine iguanas are vegetarians that feed mainly in the intertidal zone. Only large male iguanas go beyond the breakers (waves) and feed underwater in the cold water around the Galapagos. Which one of the following would allow the larger and not the smaller individuals to feed underwater in the cold water? Recall that iguanas are ectothermic poikilotherms. a). The larger males have a larger surface area to volume ratio than the smaller iguanas b). The larger males have a smaller surface area to volume ratio than the smaller iguanas c) The larger males have broader tails than the small iguanas d) The larger males have a shorter nose than the small iguanas e) The larger males have longer and sharper claws than the small iguanas Use the following information for the NEXT 2 QUESTIONS. A scientist observes that about 95% of the individual grasshoppers of a particular species are green, similar to the plants that they live on. He hypothesizes that these grasshoppers are green because they are harder for visual predators to detect against the green background of plants. To test this hypothesis, the scientist conducts an experiment. He marks 100 green grasshoppers with spots of red nail polish, another 100 green grasshoppers with transparent (colorless) nail polish, and a third 100 green grasshoppers are left unmarked. Twenty five (25) of each type ate placed in each of 4 field plots in different locations, which are videotaped over the course of a day to document predation (without the presence of the scientist to influence predator behavior). This whole experiment is repeated on 3 days and the results compared. He predicts that, if the hypothesis is correct, natural predators such as birds and praying mantises (which are also green insects) will capture more of the red-spotted grasshoppers than the control grasshoppers. He combines results (below) for all 4 plots and 3 days, after determining that there were no statistical differences between days or plots. This is an example of a(n) _____experiment in which _____is the dependent variable. a) correlational/observational, percent grasshoppers captured by birds b) correlational/observational: color of nail polish c) controlled: percent grasshoppers captured by a predator d) controlled: color of nail polish e). controlled: type of predator (bird or mantis) The result of the experiment_____ a) do not support the hypothesis b) prove that by has no effect on grasshopper populations c) support the hypothesis for birds but not for d) prove that only birds prey on grasshoppers e) both (b) and (d)

Explanation / Answer

28.

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.