________ is a peptidoglycan-like molecule found in the cell walls of some archaea.
Fill in the blank(s) with the appropriate word(s).
Pseudomurein
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If the Earth were to reorient such that the North Pole always received direct sunlight (always faced the Sun), how would that change Earth's climate?
A) The equators would not change in climate. B) The South Pole would get colder. C) The equators would get warmer. D) The North Pole would get more wind.
Members of the phylum ____ are called acorn worms. They use their mucus-coated proboscis to
construct U-shaped burrows to trap food particles, and also trap food from water passed through gill slits in their pharynx.
a. Hemichordata b. Echinodermata c. Cnidaria d. Arthropoda e. Chordata
Which of the following statements is true regarding the wavelengths of light used in photosynthesis?
A. The smaller the wavelength of light, the more energy associated with it, so plants only use the lowest wavelengths of light in order to be most efficient at photosynthesis. B. The smaller the wavelength of light, the more energy associated with it. However, the pigments in plants can only absorb light within specific ranges of wavelengths, some smaller and some larger. C. The larger the wavelength of light, the more energy associated with it, so plants use only the highest wavelengths of light in order to be most efficient at photosynthesis. D. The pigments in plants can absorb all wavelengths of light and do so for maximum photosynthetic efficiency.
You are a nutritional scientist and discover an organic molecule that is water-soluble and is essential to good health but does not appear to be manufactured by the human body. It is most likely a
A. mineral. B. carbohydrate. C. vitamin. D. polypeptide.