Answer the following question given this paragraph: The first eight phyla listed in Table above include only invertebrate animals. Invertebrates are animals that lack a vertebral column , or backbone . The last phylum in the table, the Chordata, also includes many invertebrate species. Tunicates and lancelets are both invertebrates. Altogether, invertebrates make up at least 95 percent of all animal species. The remaining animals are vertebrates. Vertebrates are animals that have a backbone. All vertebrates belong to the phylum Chordata . They include fish, amphibians, reptiles, birds, and mammals. Q: What is the term for animals that have a backbone? Choices: - carnivores - invertebrates - herbivores - vertebrates A:
vertebrates
(Question)
Answer the following question given this paragraph: Fresh water is essential for good crops. In some areas of the world, there is enough rain to accomplish this task. In other locales, water must be provided so the crops will grow. Worldwide, irrigation covers about 18% of farm land and produces some 40% of crops. A major source of cleaner water in many parts of the world is provided by the process of desalinization . Q: Which process helps provide cleaner water for agriculture? Choices: - purification - sterilization - osmosis - process of desalinization A:
(Answer)
process of desalinization
Ques: Answer the following question given this paragraph: Water molecules move about continuously due to their kinetic energy. When a crystal of sodium chloride is placed into water, the water's molecules collide with the crystal lattice. Recall that the crystal lattice is composed of alternating positive and negative ions. Water is attracted to the sodium chloride crystal because water is polar and has both a positive and a negative end. The positively charged sodium ions in the crystal attract the oxygen end of the water molecules because they are partially negative. The negatively charged chloride ions in the crystal attract the hydrogen end of the water molecules because they are partially positive. The action of the polar water molecules takes the crystal lattice apart (see image below). Q: Water molecules move about continuously due to what type of energy? Choices: - seismic - potential - optical - kinetic A:
Ans: kinetic
(Q).
Answer the following question given this paragraph: Sometimes large numbers of species go extinct in a short amount of time. This is a mass extinction . The causes of different mass extinctions are different: collisions with comets or asteroids, massive volcanic eruptions, or rapidly changing climate are all possible causes of some of these disasters ( Figure below ). Q: What term is used to describe large numbers of species that go extinct in a short amount of time? Choices: - formation extinction - organic extinction - species extinction - mass extinction A:
(A).
mass extinction
Ques:Answer the following question given this paragraph: Drip irrigation uses much less water than other methods. Q: Which kind of irrigation uses much less water than other methods? Choices: - constant - mist - solar - drip A:

Ans:drip
Ques: Answer the following question given this paragraph: Plant Parasites Protist parasites of terrestrial plants include agents that destroy food crops. The oomycete Plasmopara viticola parasitizes grape plants, causing a disease called downy mildew (Figure 23.33). Grape plants infected with P. viticola appear stunted and have discolored, withered leaves. The spread of downy mildew nearly collapsed the French wine industry in the nineteenth century. Q: What disease is caused when the oomycete plasmopara viticola parasitizes grape plants? Choices: - dainty mildew - alkaline mildew - toxic mildew - downy mildew A:
Ans:
downy mildew