Answer the following question given this paragraph: Parasitic roundworms may have plant, vertebrate, or invertebrate hosts. Several species have human hosts. For example, hookworms, like the one in Figure below , are human parasites. They infect the human intestine. They are named for the hooks they use to grab onto the host's tissues. Hookworm larvae enter the host through the skin. They migrate to the intestine, where they mature into adults. Adults lay eggs, which pass out of the host in feces. Then the cycle repeats. Q: Through which organ do hookworm larvae enter the human body? Choices: - through the lungs - through the rectum - through the mouth - through the skin A:
through the skin
Answer the following question given this paragraph: Parts of the Digestive System The vertebrate digestive system is designed to facilitate the transformation of food matter into the nutrient components that sustain organisms. Oral Cavity The oral cavity, or mouth, is the point of entry of food into the digestive system, illustrated in Figure 34.9. The food consumed is broken into smaller particles by mastication, the chewing action of the teeth. All mammals have teeth and can chew their food. The extensive chemical process of digestion begins in the mouth. As food is being chewed, saliva, produced by the salivary glands, mixes with the food. Saliva is a watery substance produced in the mouths of many animals. There are three major glands that secrete salivathe parotid, the submandibular, and the sublingual. Saliva contains mucus that moistens food and buffers the pH of the food. Saliva also contains immunoglobulins and lysozymes, which have antibacterial action to reduce tooth decay by inhibiting growth of some bacteria. Saliva also contains an enzyme called salivary amylase that begins the. Q: What system is designed to facilitate the transformation of food matter into the nutrient components that sustain organisms? Choices: - tissue - skeletal - respiratory - digestive A:
digestive
Q: Answer the following question given this paragraph: Acids are molecular compounds that dissolve in water to produce hydronium ions and an anion. Q: Acids are molecular compounds that dissolve in water to produce hydronium ions and what else? Choices: - a neutron - a proton - an alkali - an anion A:
A: an anion
Question: Answer the following question given this paragraph: The phylum Annelida is made up of segmented worms such as earthworms . Segmented worms are divided into many repeating segments. There are roughly 15,000 species of annelids. Most belong to one of three classes. A species in each class is pictured in Figure below . See The Cambrian Explosion at http://www. pbs. org/kcet/shapeoflife/episodes/explosion. html for an introduction to annelids. Q: Earthworms and segmented worms belong to what phylum? Choices: - bryozoa - nematoda - protazoa - annelida A:
Answer: annelida
*Question*
Answer the following question given this paragraph: Most tunicates live a sessile existence in shallow ocean waters and are suspension feeders. The primary foods of tunicates are plankton and detritus. Seawater enters the tunicate's body through its incurrent siphon. Suspended material is filtered out of this water by a mucus net (pharyngeal slits) and is passed into the intestine through the action of cilia. The anus empties into the excurrent siphon, which expels wastes and water. Lancelets possess a notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail in the adult stage (Figure 15.35). The notochord extends into the head, which gives the subphylum its name (Cephalochordata). Extinct fossils of this subphylum date to the middle of the Cambrian period (540488 mya). The living forms, the lancelets, are named for their blade-like shape. Lancelets are only a few centimeters long and are usually found buried in sand at the bottom of warm temperate and tropical seas. Like tunicates, they are suspension feeders. Q: Most tunicates live a sessile existence in shallow ocean waters and are suspension feeders. the primary foods of tunicates are plankton and this? Choices: - bacteria - crustaceans - debris - detritus A:
**Answer**
detritus
Answer the following question given this paragraph: Figure 24.16 Which of the following statements is true? a. A basidium is the fruiting body of a mushroomproducing fungus, and it forms four basidiocarps. The result of the plasmogamy step is four basidiospores. Karyogamy results directly in the formation of mycelia. A basidiocarp is the fruiting body of a mushroom-producing fungus. Figure 24.20 If symbiotic fungi are absent from the soil, what impact do you think this would have on plant growth?. Q: A basidium is the fruiting body of a mushroomproducing fungus, and it forms four what? Choices: - schizonts - tunnels - fossiliferous - basidiocarps A:
basidiocarps