Which one of these is NOT an example of a parasite? Select one: a. A bromeliad plant growing on the trunk of a rainforest tree that derives its moisture and nutrients from the air, rain and debris accumulating around the plant. b. A leech feeding on blood it extracts from the leg of a human host. c. A Rafflesia plant using a specialised absorptive organ, known as a haustorium, to draw nutrients from other plants. d. A tapeworm that lives inside the intestine of an animal and feeds off the food that the animal is digesting.

O They are considered plant parasites. Barnacles are crustaceans that live in the ocean. Barnacle larvae are motile and secrete a sticky substance that allows them to attach to a suitable substrate. As they mature into sedentary adults, they secrete layers of calcium carbonate that serve as a protective covering. Some barnacles have been known to attach to the sides of whales. This benefits the barnacles in that they are constantly transported to locations with new sources of food. The whes neither benefit nor are harmed by the presence of barnacles. Barnacles follow r selection strategies. How would the interaction between barnacles and whales be described?" O Commensalism O Mutualism O Competition O Parasitism Sea otters. Enhydra lutris. are predators of sea urchins, Strongylocentrotus

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Suppose you are trying to explain the following phenomenon: My indoor fern (houseplant) always thrives in the summers but struggles in the winter. Consider the following four explanations. Identify which explanation is the best. For each of the other three explanations, explain which theoretical virtue it is most lacking. 1. This winter your fern struggled because there was a parasite infestation. Last winter your fern struggled because it was too close to the cold window, and the year before it struggled because you went on a long holiday and had your sister watch your plants for you and she brought her dog. 2. Your fern struggles in the winter because you barely water it. However, your fern does well in summer because that's when the garden gnomes are active and they come to life to take care of your fern when you're not looking. 3. Your fern struggles in the summer because it doesn't get enough sunlight. In the winter, the southern exposure allows for it to get lots of direct…