The Winogradsky column is a method for assessing the entire gene complement of a habitat, revealing both the biodiversity and metabolic capabilities of the microbial community at the same time
Indicate whether the statement is true or false.
Answer: FALSE
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One of the earliest antimicrobials isolated from a bacterium was
A. penicillin. B. ampicillin. C. Salvarsan. D. streptomycin.
What makes a mineral element essential for plant growth?
A. It is part of typical chemical fertilizers. B. It can only be found in organic fertilizers. C. If it is missing, the plant cannot grow or reproduce normally. D. As its concentration increases, the plant grows more. E. It contributes to the solute potential of the plant.
Scientists measured the pressure in the xylem of redwood trees at different heights and found that the higher they made their measurements, the lower the pressure. They extrapolated this to a pressure of zero, and concluded that the tallest a tree could grow is 122–130 meters. The tallest known tree on Earth is 112.7 meters. What assumption were the scientists making to conclude that when pressure was zero, the plant could grow no further?
A. Turgor pressure would be greater than gravity. B. Transpiration would be less than uptake of water from the xylem. C. Leaves above that point would not receive any sunlight. D. Leaves above that point would not receive any water. E. Stems above that point could not transport sugars in their xylem.
The three types of cartilage are fibrocartilage, elastic cartilage, and ________ cartilage.
Fill in the blank(s) with the appropriate word(s).