Nutrient molecules are used as building blocks or for energy. This best represents which characteristic of life?
What will be an ideal response?
Living things acquire materials and energy from the environment.
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____________ is the scientific study of the search for life on other worlds and the likelihood that life exists elsewhere
Fill in the blank(s) with correct word
Which of the following antimicrobials works by inhibiting protein synthesis?
A) Aminoglycosides, such as gentamicin B) MLSs, such as azithromycin C) Tetracycline D) all of the above
Which of the following statements is INCORRECT?
a) Oxygen was abundant in the Earth's early atmosphere, before the origin of life. b) Experiments like Miller and Urey's do not work in the presence of oxygen. c) Environments without oxygen are the best for preserving fossils. d) Oxygen attacks chemical bonds and extracts electrons, which prevents the formation of complex molecules. e) The accumulation of oxygen in the early environment was a result of the photosynthetic activity of terrestrial plants.
Which of these organisms is able to use several body surfaces, such as gills, skin, and lungs, for respiration?
A. amphibians B. humans C. birds D. reptiles E. None of these are correct.