In brown air fog, which substance combines with nitrogen dioxide in the sunlight to form
photochemical smog?
a. carbon monoxide
b. water vapor
c. hydrocarbons
d. sulfuric acid
e. carbon dioxide
C
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What is periderm?
a. special epidermal cells that regulate gas exchange b. outer layer of the vascular cylinder in a plant root c. layers of cells just inside root endodermis d. dermal tissue that replaces epidermis on the surfaces of older stems and roots
e. tissue that consists of densely packed dead cells with thickened, waxy wallsWhich of the following monomers is not paired correctly?
A) glucose-carbohydrates B) amino acids-proteins C) nucleotides-nucleic acids D) All of these are paired properly.
NASA hopes to send the first astronauts to Mars by sometime in the 2030s. If life is found on Mars, what can we say likely will be true of that life form based on what we have learned of life on Earth?
A. That any life on Mars must be photosynthetic. B. That any life found on Mars will likely be in a dormant state due to the cold temperatures there. C. That any life found on Mars will be radically different than anything found on earth. D. That life on Mars will be cellular in nature, composed of one or more cells, like all life on Earth.
______ is the nonspecific cellular and vascular reaction to tissue trauma.
Fill in the blank(s) with the appropriate word(s).