Answer the following question given this paragraph: Figure 21.4 Viruses can be either complex in shape or relatively simple. This figure shows three relatively complex virions: the bacteriophage T4, with its DNA-containing head group and tail fibers that attach to host cells; adenovirus, which uses spikes from its capsid to bind to host cells; and HIV, which uses glycoproteins embedded in its envelope to bind to host cells. Notice that HIV has proteins called matrix proteins, internal to the envelope, which help stabilize virion shape. (credit "bacteriophage, adenovirus": modification of work by NCBI, NIH; credit "HIV retrovirus": modification of work by NIAID, NIH). Q: Hiv has proteins called what, internal to the envelope, which help stabilize virion shape? Choices: - reduction proteins - step proteins - sphere proteins - matrix proteins A:
matrix proteins
(Question)
Answer the following question given this paragraph: An emulsion is a colloidal dispersion of a liquid in either a liquid or a solid. Q: What term describes a colloidal dispersion of a liquid in either a liquid or a solid? Choices: - mix - suspension - compound - emulsion A:
(Answer)
emulsion
Ques: Answer the following question given this paragraph: Gregor Mendel was born in 1822 and grew up on his parents' farm in Austria. He did well in school and became a monk. He also went to the University of Vienna, where he studied science and math. His professors encouraged him to learn science through experimentation and to use math to make sense of his results. Mendel is best known for his experiments with the pea plant Pisum sativum (see Figure below ). You can watch a video about Mendel and his research at the following link: http://www. metacafe. com/watch/hl-19246625/milestones_in_science_engineering_gregor_mendel_and_classical_genetics/ . Q: What scientist and monk is best known for his experiments with pea plants? Choices: - steiner mendel - charles darwin - aristotle - gregor mendel A:
Ans: gregor mendel
(Q).
Answer the following question given this paragraph: As you can see in Figure above , a transformer consists of two wire coils wrapped around an iron core. When alternating primary current passes through coil P, it magnetizes the iron core. Because the current is alternating, the magnetic field of the iron core keeps reversing. This changing magnetic field induces alternating current in coil S, which is part of another circuit. In Figure above , coil P and coil S have the same number of turns of wire. In this case, the voltages of the primary and secondary currents are the same. However, when the two coils have different numbers of turns, the voltage of the secondary current is different than the voltage of the primary current. Both cases are illustrated in Figure below . Q: When alternating primary current passes through coil p, it does what to the iron core? Choices: - electrilizes it - creates it - heats it - magnetizes it A:
(A).
magnetizes it
Ques:Answer the following question given this paragraph: There are about 50,000 living species of vertebrates. They are placed in nine classes: five classes of fish plus amphibians, reptiles, birds, and mammals. Q: In addition to five classes of fish, what other classes make up the species of vertebrates? Choices: - amphibians , vertebrae , birds , and mammals - reptiles, birds, mammals, and primates - insects, amphibians, reptiles, and birds - amphibians, reptiles, birds, and mammals A:

Ans:amphibians, reptiles, birds, and mammals
Question: Answer the following question given this paragraph: Respiratory tree: terminates in alveolus, alveoli. Respiratory bronchioles branch into alveolar ducts and into alveoli. Alveolus: microscopic air sacs, 300 million of these in human lungs. Total surface area large. Gas diffuses micrometer, very tiny distance. Nervous System Composed of tissues designed to integrate sensory information and direct a coordinated response to the environment. Basic unit of the nervous system is the neuron1 , a highly specialized cell that uses both electrical and chemical processes to communicate. Neurons "listen" to sensory organs or other neurons, and can simultaneously "hear" from 1 to hundreds of inputs simultaneously. Likewise, a neuron can "talk" to other neurons or cells that can create an action, like muscle cells or glands. Neurons are outnumbered in the nervous system by glia. Glia were once thought to only play a supportive role in helping neurons survive; today we know that they also are important participants in the communication process. Glial cells include astrocytes, ependymal cells, and a cell that has a macrophage like function. There are also oligodendocytes and Schwann cells that provide a myelin sheath. Q: Alveoli can be found in which organ in the human body? Choices: - Stomach - Liver - Heart - lungs A:
Answer:
lungs