The acacia tree provides a number of benefits to the pseudomyrmex ants that llive on or near the trees. the trees provide shelter, protein, and nectar. the ants provides several forms of protection. they attack and remove herbivorous insects. they also remove vines that might overgrow the acacia and kill the growing shoots of nearby plants that might become competitors. the relationship between these ants and the acacia trees may best be described as a) competitive. b) mutualistic. c) predatory. d) symbiotic.

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

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Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous