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Chapter 22: Q. 19 (page 571)
Plants use carbon dioxide from the air and are therefore called _____.
a. consumers
b. producers
c. decomposer
d. carbon fixers
Plants use carbon dioxide from the air and are therefore called as producers
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Prokaryotes stain as Gram-positive or Gram-negative because of differences in the cell _______.
a. wall
b. cytoplasm
c. nucleus
d. chromosome
Which of the statements about biofilms is incorrect?
Biofilms are considered responsible for diseases
such as cystic fibrosis.
Biofilms produce dental plaque and colonize
catheters and prostheses.
Biofilms colonize open wounds and burned tissue.
All statements are incorrect.
Farmers continually rotate the crops grown in different fields to maintain nutrients in the soil. How would planting soybeans in a field the year after the field was used to grow carrots help maintain nitrogen in the soil?
Which of these statements is true?
An antibiotic is any substance produced by a
organism that is antagonistic to the growth of
prokaryotes.
An antibiotic is any substance produced by a
prokaryote that is antagonistic to the growth of
other viruses.
An antibiotic is any substance produced by a
prokaryote that is antagonistic to the growth of
eukaryotic cells.
An antibiotic is any substance produced by a
prokaryote that prevents growth of the same prokaryote.
A new bacterial species is discovered and classified as an endolith, an extremophile that lives inside rock. If the bacteria were discovered in the permafrost of Antarctica, describe two extremophile features the bacteria must possess.
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