Answer the following question given this paragraph: Many people think that any idea that is completely accepted in science is a law. But that is not true. In science, a law is something that always applies under the same conditions. A law explains a fairly simple phenomenon. A theory is much more complex: it tells you why something happens. A law only tells you that it happens. For example, if you hold something above the ground and let go, it will fall. This phenomenon is recognized by the law of gravity ( Figure below ). Some people say that evolution is "just a theory. " But for a complex explanation like evolution, theory is the right word. Q: In science, what do you call something that always applies under the same conditions? Choices: - theory - hypothesis - scientific method - scientific law A:
scientific law
(Question)
Answer the following question given this paragraph: The outer planets are made of hydrogen and helium, so they are called gas giants. Q: The outer planets are made of hydrogen and helium, so they are termed what? Choices: - hydrogen giants - light giants - helium giants - gas giants A:
(Answer)
gas giants
Ques: 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:
Ans: fungus
(Q).
Answer the following question given this paragraph: 22.3 Viral Genome The genome of a virus consists of DNA or RNA, whose size and configuration vary. The entire genome can exist as a single nucleic acid molecule or several nucleic acid segments. Also, the DNA or RNA may be single-stranded or double-stranded, and either linear or circular. Not all viruses can reproduce in a host cell by themselves. Since viruses are so small, the size of their genome is limiting. For example, some viruses have coded instructions for only making a few different proteins for the viruses' capsid. On the other hand, the human genome codes for over 30,000 different proteins. Therefore, the lack of coded instructions cause some viruses to need the presence of other viruses to help them reproduce themselves. Such viruses are called replication defective. Lastly, it is worthy to note that 70% of all viruses are RNA viruses. As the process of RNA replication (with enzymes and other organelles of the host cell) is more prone to errors, RNA viruses have much higher mutation rates than do DNA viruses. Q: Viruses need what kind of cell in order to help themselves reproduce? Choices: - round - side - double - host A:
(A).
host
Ques:Answer the following question given this paragraph: Some unstable acids decompose to produce nonmetal oxides and water. Carbonic acid decomposes easily at room temperature into carbon dioxide and water. Q: Carbonic acid decomposes easily at room temperature into carbon dioxide and what else? Choices: - gas - oxygen - helium - water A:

Ans:water
Ques: Answer the following question given this paragraph: A physical change is a change in one or more physical properties of matter without any change in chemical properties. In other words, matter doesn't change into a different substance in a physical change. Examples of physical change include changes in the size or shape of matter. Changes of statefor example, from solid to liquid or from liquid to gasare also physical changes. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting. Four examples of physical change are pictured in the Figure below . You can learn more about physical changes and why they occur by watching the video at this URL:. Q: A change in one or more physical properties of matter without any change in chemical properties is called what? Choices: - negative change - positive change - atmospheric change - physical change A:
Ans:
physical change