The adaptive advantage associated with the filamentous nature of fungal mycelia is primarily related to _____
A) the ability to form haustoria and parasitize other organisms
B) avoiding sexual reproduction until the environment changes
C) the potential to inhabit almost all terrestrial habitats
D) the increased probability of contact between different mating types
E) an extensive surface area well suited for invasive growth and absorptive nutrition
Answer: E
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Triiodothyronine (T3) is secreted by the ____
a. parathyroid gland b. thyroid gland c. pancreas d. adrenal cortex e. adrenal medulla
List the stages in the eukaryotic cell cycle and identify the principal events characteristic of each stage. What will be an ideal response?
When he arrived at the Galápagos Islands, Darwin did not observe the amazing tool-using "woodpecker finch" that can modify twigs to pry out grubs. Because there are no true woodpeckers on the Galápagos Islands, this behavior allows this finch to exploit an untapped food source. However, not all members of this species exhibit this behavior, which is probably learned from watching other finches. Therefore, which of the following is NOT true?
A) It is probably not "hardwired" in the brain as a behavior passed on genetically. B) Young isolated at hatching will not know how to do this. C) This "learned" behavior will not lead to evolutionary change in the woodpecker population. D) There must be a great advantage to reaching this food source for this learned behavior to be repeated by most descendants each generation.
Which of the following is NOT a domain in Woese and Fox's phykogenetic tree?
A. Plantae B. Bacteria C. Archaea D. Eukarya