Q: Which parasite causes downy mildew in grape plants? Read this paragraph and choose the correct option from the provided answers: 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 13.18a). Grape plants infected with P. viticola appear stunted and have discolored withered leaves. The spread of downy mildew caused the near collapse of the French wine industry in the nineteenth century. Choices: - taphrina confusa - epichloe typhina - chrysomyxa ledi - plasmopara viticola A:
plasmopara viticola

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Q: Fungi are unique in having cell walls made of what? Read this paragraph and choose the correct option from the provided answers: Fungi are a kingdom in the domain Eukarya that includes molds, mushrooms, and yeasts. Most fungi are multicellular. They are unique in having cell walls made of chitin. Choices: - prokaryotic - Protein - lectin - chitin A:
(Answer)
chitin

Ques: Q: Modern members of what broad animal group live in many different habitats and are found on every continent except antarctica? Read this paragraph and choose the correct option from the provided answers: Modern reptiles live in many different habitats. They can be found on every continent except Antarctica. Choices: - arachnids - amphibians - parasites - reptiles A:
Ans: reptiles

(Q).
Q: Misconceptions about what theory contribute to the controversy that still surrounds this fundamental principle of biology? Read this paragraph and choose the correct option from the provided answers: Today, evolution is still questioned by some people. Often, people who disagree with the theory of evolution do not really understand it. For example, some people think that the theory of evolution explains how life on Earth first began. In fact, the theory explains only how life changed after it first appeared. Some people think the theory of evolution means that humans evolved from modern apes. In fact, the theory suggests humans and modern apes have a common ancestor that lived several million years ago. These and other misconceptions about evolution contribute to the controversy that still surrounds this fundamental principle of biology. Choices: - darwin on evolution - brain of evolution - cycle of evolution - theory of evolution A:
(A).
theory of evolution

Ques:Q: What do atoms make by rearranging their chemical bonds in a reactant? Read this paragraph and choose the correct option from the provided answers: When a chemical reaction occurs, the atoms in the reactants rearrange their chemical bonds to make products. The new arrangement of bonds does not have the same total energy as the bonds in the reactants. Therefore, when chemical reactions occur, there will always be an accompanying energy change. In some reactions, the energy of the products is lower than the energy of the reactants. Thus, in the course of the reaction, the substances lose energy to the surrounding environment. Such reactions are exothermic and can be represented by an energylevel diagram like the one in http://catalog. flatworldknowledge. com/bookhub/reader/2547 gob-ch07_s04_f01. In most cases, the energy is given off as heat (although a few reactions give off energy as light). Figure 7.3 Exothermic Reactions. Choices: - solutions - compounds - minerals - products A:

Ans:products

Q: What consists of four major components: inorganic mineral matter, organic matter, water and air, and living matter? Read this paragraph and choose the correct option from the provided answers: 31.2 The Soil Plants obtain mineral nutrients from the soil. Soil is the outer loose layer that covers the surface of Earth. Soil quality depends on the chemical composition of the soil, the topography, the presence of living organisms, the climate, and time. Agricultural practice and history may also modify the characteristics and fertility of soil. Soil consists of four major components: 1) inorganic mineral matter, 2) organic matter, 3) water and air, and 4) living matter. The organic material of soil is made of humus, which improves soil structure and provides water and minerals. Soil inorganic material consists of rock slowly broken down into smaller particles that vary in size, such as sand, silt, and loam. Soil formation results from a combination of biological, physical, and chemical processes. Soil is not homogenous because its formation results in the production of layers called a soil profile. Factors that affect soil formation include: parent material, climate, topography, biological factors, and time. Soils are classified based on their horizons, soil particle size, and proportions. Most soils have four distinct horizons: O, A, B, and C. Choices: - nitrogen - color - rocks - soil A:
soil