Group living allows transmission of cultural traits among in wild chimpanzees, such as ________
a. the capacity to make and use simple tools such as sticks to extract termites from a mound
b. the strong pair-bond relationships formed between males and females well before sexual maturity
c. a crude form of writing where male chimps scratch markings in the dirt
d. the tradition of chimps frequently leaving one social group to join another
a
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The lesions in the brains of people with Alzheimer disease are caused by a protein fragment called
___________________. Fill in the blank(s) with the appropriate word(s).
How many other bands of sea-floor crust in the figure above have the same magnetic polarity as the crust that directly straddles the rift valley?
A) two bands B) four bands C) five bands D) eight bands
A P. bursaria cell that has lost its zoochlorellae is aposymbiotic. If aposymbiotic cells have population growth rates the same as those of healthy,
zoochlorella-containing P. bursaria in well-lit environments with plenty of prey items, then such an observation would be consistent with which type of relationship? A) parasitic B) commensalistic C) toxic D) mutualistic
Which of the following best explains why regulating opening and closing stomata is more difficult in dry and hot environments?
a. Photorespiration becomes a bigger problem as the climate becomes colder. b. Photorespiration becomes a bigger problem as the climate becomes warmer. c. Photorespiration becomes a lesser problem as the climate becomes warmer. d. Photorespiration becomes a lesser problem as the climate becomes colder.