Protists, Bacteria, And Viruses: Question Preview (ID: 18645)

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Which structure of a diatom is rich in silicon?
a) cell wall b) nucleus c) flagellum d) eyespot
Why can the use of antibiotics to fight minor illness become a serious problem?
a) Viruses adapt and change to make antibiotics ineffective. b) Bacteria can use the antibiotics against the host. c) Viruses can use the antibiotics to increase their replication. d) Bacteria adapt and become immune to the antibiotics.
A patient's blood is tested, and the substance found in the blood is living, microscopic, and responsible for the patient's tuberculosis. Which substance is making the patient ill?
a) bacteria b) mold c) algae d) virus
Which statement supports the theory that chloroplasts evolved from cyanobacteria?
a) Chloroplasts are created by cells. b) Chloroplasts have DNA. c) Chloroplasts lack an outer membrane. d) Chloroplasts synthesize their own proteins.
Animal digestive systems do not function appropriately without the aid of other organisms. In which kingdom do these organisms belong?
a) Eubacteria b) Protista c) Plantae d) Fungi
Three and a half billion years ago, Earth was much hotter than it is now, and there was little to no oxygen in the atmosphere. Based on these atmospheric conditions, which species originated 3.5 billion years ago?
a) unicellular algae b) multicellular plants c) unicellular bacteria d) multicellular animals
Microfossils of single-celled prokaryotic organisms have been found in rocks that are at least 3.5 billion years old. What led to the conclusion that single-celled prokaryotic organisms evolved in the absence of oxygen?
a) Earth's plant life 3.5 billion years ago was unable to produce oxygen. b) Earth's atmosphere 3.5 billion years ago contained very little to no oxygen. c) The microfossils show evidence that single-celled prokaryotic organisms had a cytoplasm, which is the site where glycolysis t d) The microfossils show no evidence that single-celled prokaryotic organisms had a mitochondrion, which is the site where cellu
A group of biology students wanted to know more about the growth of algae in local ponds. They studied algae living in a sunny pond and algae living in a shady pond. How will the rate of cell division MOST LIKELY differ between the algae?
a) The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight. b) The algae in the shady pond will have a slower rate of cell division because cold water inhibits their growth. c) The algae in the shady pond will have a faster rate of cell division because they are protected from direct sunlight. d) The algae in the sunny pond will have a slower rate of cell division because the higher water temperature causes mutations.
A dinoflagellate contains two flagella that work together and enable the dinoflagellate to perform which function?
a) crawl through mud b) spin through water c) store carbohydrates d) initiate photosynthesis
Yellow-green algae and golden-brown algae belong to the phylum Chrysophyta, which means golden plants. Which structure provides the plants with the bright yellow pigments that give this phylum its name?
a) gullet b) pellicle c) nucleus d) chloroplast
Which structure helps a euglenophyte locate sunlight to power photosynthesis?
a) gullet b) pellicle c) eyespot d) chloroplast
How do immunizations help fight the polio epidemic?
a) They provide the body with a deadly antigen that allows the body to produce high concentrations of T-killer cells. b) They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v c) They provide the body with a compliment protein that enables the body to recognize and destroy all viruses. d) They provide the body with a boost of white blood cells that the body can increase in number during an infection.
Edward Jenner created the first vaccine in 1796. Which statement explains what Jenner was trying to accomplish?
a) He wanted to provide the public with a healthier form of meat. b) He wanted to ensure that dairy products were pasteurized. c) He wanted to develop an end to all bacterial infections. d) He wanted to relieve the public from the small pox epidemic.
Which sentence BEST explains a virus's means of replication?
a) The virus attaches to a living host cell and begins to reproduce with the cell, thereby producing hybrid cells. b) The virus attaches to a living host cell and begins to control the cell, thereby replicating more specimens. c) The virus attaches to a nonliving host cell and begins to use the cellular material to replicate. d) The virus attaches to a nonliving host cell and begins to self-reproduce until a living cell is available.
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