The practice of "eating down the food chain" refers to eating more plant material and less herbivores. Explain how this is a more efficient use of energy
What will be an ideal response?
Approximately 90% of the energy present in the primary producer trophic level is lost when you move up to the next level. Therefore, it would be more efficient to have as few energy conversions in a food chain as possible.
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The first line of plant defense against pathogen infection is(are) the:
A. cuticle. B. plasmodesmata. C. stomata. D. pathogens. E. cell walls.
Which disease is associated with prions?
a. Scrapie b. Bovine spongiform encephalitis c. Mad cow disease d. Creutzfeldt-Jacob e. All are associated with prions.
____________________ are open channels that connect the cytoplasm of abutting cells and permit rapid transfer of
ions and small molecules between them. Fill in the blank(s) with the appropriate word(s).
Promising options being explored to control fire ants
include a. biological controls. b. pesticides. c. wholesale physical destruction of their mounds. d. herbicides. e. all of these.