Answer the following question given this paragraph: Plant Parasites and Pathogens The production of enough good-quality crops is essential to our existence. Plant diseases have ruined crops, bringing widespread famine. Most plant pathogens are fungi that cause tissue decay and eventual death of the host (Figure 13.25). In addition to destroying plant tissue directly, some plant pathogens spoil crops by producing potent toxins. Fungi are also responsible for food spoilage and the rotting of stored crops. For example, the fungus Claviceps purpurea causes ergot, a disease of cereal crops (especially of rye). Although the fungus reduces the yield of cereals, the effects of the ergot's alkaloid toxins on humans and animals are of much greater significance: In animals, the disease is referred to as ergotism. The most common signs and symptoms are convulsions, hallucination, gangrene, and loss of milk in cattle. The active ingredient of ergot is lysergic acid, which is a precursor of the drug LSD. Smuts, rusts, and powdery or downy mildew are other examples of common fungal pathogens that affect crops. Q: A type of what organism causes ergot, a disease that impacts crops directly and has more devastating effects on animals? Choices: - insects - bacteria - virus - fungus A:
fungus
Answer the following question given this paragraph: The energy effects of a wave depend on time as well as amplitude. For example, the longer deep-heat ultrasound is applied, the more energy it transfers. Waves can also be concentrated or spread out. Sunlight, for example, can be focused to burn wood. Earthquakes spread out, so they do less damage the farther they get from the source. In both cases, changing the area the waves cover has important effects. All these pertinent factors are included in the definition of intensity I as power per unit area:. Q: The energy of a wave depends on time as well as what other property of the wave? Choices: - force - power - frequency - amplitude A:
amplitude
Q: Answer the following question given this paragraph: Because electricity can be so dangerous, safety features are built into modern electric circuits and devices. They include three-prong plugs, circuit breakers, and GFCI outlets. You can read about these three safety features in the Figure below . You can learn more about electric safety features in the home by watching the video at this URL: http://www. dailymotion. com/video/x6fg5i_basics-of-your-home-s-electrical-sy_school . Q: Three-prong plugs, circuit breakers, and gfci outlets are safety features that recognize the danger of what? Choices: - heat - magnetism - gravity - electricity A:
A: electricity
Question: Answer the following question given this paragraph: Mutations have many possible causes. Some mutations occur when a mistake is made during DNA replication or transcription. Other mutations occur because of environmental factors. Anything in the environment that causes a mutation is known as a mutagen . Examples of mutagens are shown in Figure below . They include ultraviolet rays in sunlight, chemicals in cigarette smoke, and certain viruses and bacteria. Q: What is it called when a mistake occurs in dna replication. Choices: - adaptation - degradation - radiation - mutation A:
Answer: mutation
*Question*
Answer the following question given this paragraph: Bones are made up of different types of tissues. Q: What are bones made up of? Choices: - molecules - platelets - muscles - tissues A:
**Answer**
tissues
(Question)
Answer the following question given this paragraph: Ecological succession is the process in which a community changes through time. Primary succession occurs in an area that has never before been colonized. Secondary succession occurs in a formerly inhabited area that was disturbed. Q: What is the term for the process in which an area that has never before been colonized changes through time? Choices: - continuous succession - environmental succession - colony succession - ecological succession A:
(Answer)
ecological succession