In lichens, the fungi send projections of their hyphae across the algal cell wall in order to obtain nutrients from the photosynthetic partner. These projections are called ________.
A. hyphal extensions
B. lichenthropes
C. haustoria
D. mycelia
Answer: C
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The portion of the DNA molecule that is not
translated and is a noncoding portion of DNA is composed of a. introns. b. anticodons. c. exons. d. transcriptons. e. exons and transcriptons.
Which of the following best explains why herbivorous organisms are more energetically efficient than those that consume meat?
a. herbivorous organisms are slower and therefore burn fewer calories b. herbivorous organisms obtain their energy directly from the sun c. herbivorous organisms are at the top of the food chain d. herbivorous organisms need to consume less food than meat eaters to obtain the same amount of energy e. herbivorous organisms are at the bottom of the food chain
A(n) ________ is a disease in which antibodies attack specific cells of the body.
Fill in the blank(s) with the appropriate word(s).
This organism can infect deeper wound sites and produce exotoxins, enzymes and gas that cause tissue and muscle necrosis:
A. Clostridium botulinum B. Clostridium perfringens C. Clostridium difficile D. Clostridium tetani E. All of the choices are correct.