The most important metabolic pathway of living organisms is photosynthesis because its products directly or indirectly affect most living organisms.
True or False?
True
False
The Correct Answer is A
Photosynthesis is the process by which plants, algae, and some bacteria use light energy to convert water and carbon dioxide into organic molecules, such as glucose, that can be used as food or building blocks for other molecules. Photosynthesis also releases oxygen as a by-product, which is essential for aerobic respiration in animals and other organisms.
Photosynthesis is the primary source of energy and organic matter for most living organisms on Earth, either directly or indirectly. Directly, photosynthesis provides food for the primary producers, such as plants and algae, that make their own food. Indirectly, photosynthesis provides food for the consumers, such as animals and fungi, that eat the primary producers or other consumers.
Photosynthesis also affects the global climate and the carbon cycle by removing carbon dioxide from the atmosphere and storing it in organic matter. Therefore, photosynthesis is the most important metabolic pathway of living organisms because its products have a significant impact on the biosphere.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale: A cover slip is correct because a cover slip is a thin, transparent piece of glass or plastic that can be placed over the specimen on the slide. A cover slip protects the specimen from drying out, dust, or damage, and creates a flat surface for viewing under the microscope.
Choice B rationale: Clear paper is incorrect because clear paper is not suitable for covering a wet mount specimen. Clear paper is a type of paper that is transparent or translucent, but it is not thin or flat enough to fit over the specimen on the slide. Clear paper can also interfere with the passage of light or distort the image of the specimen.
Choice C rationale: Transparent tape is incorrect because transparent tape is also not suitable for covering a wet mount specimen. Transparent tape is a type of adhesive tape that is clear or see-through, but it is sticky and can damage the specimen or the slide. Transparent tape can also affect the quality of the image or the focus of the microscope.
Choice D rationale: Another glass slide is incorrect because another glass slide is too thick and heavy to cover a wet mount specimen. Another glass slide is a thin, flat piece of glass or plastic that can be used to place the specimen on, but not over it. Another glass slide can also crush the specimen or block the light source of the microscope.
Correct Answer is B
Explanation
Tonicity is the ability of a solution to cause water movement across a semi-permeable membrane, such as the cell membrane. In the lab, tonicity can be tested by observing the effects of different solutions on cells, such as red blood cells or plant cells. However, the items that have been contaminated with blood, such as slides, pipettes, or gloves, cannot be thrown away in the regular trash can, because they pose a biohazard risk. Biohazardous waste is any material that contains or has been exposed to infectious agents, such as blood, bacteria, viruses, or parasites. Biohazardous waste must be handled and disposed of according to specific safety protocols, such as using autoclaves, incinerators, or biohazard bags. Therefore, after testing tonicity in the lab, the items that have been contaminated with blood cannot be disposed of in the trash can.
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