Which tree species was most often killed by A. ostoyae in control forests? Which was least affected by the fungus? For the most affected species, what percentage of deaths did A. ostoyae cause in control and in experimental forests? Looking at the overall results, do the data support the hypothesis? Does stump removal reduce effects of A. ostoyae? These data best support the hypothesis that:
1.Armillaria ostoyae acts as a parasite of living trees because it draws nutrients from them.
2.Pine trees had the highest overall mortality rate
3.Birch trees were rare in this forest.
4.Stump removal reduced the effects of A. ostoyae.
4
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Andrew Hendry and colleagues demonstrated that the process of speciation is gradual by studying the distribution and variation in gill raker length in ________
A) brook trout B) aquatic copepods C) salmonids D) threespine sticklebacks E) razorfish
Which of the following behaviors involves the LEAST learning?
A. A lion capturing its prey B. A newborn human grasping something placed in its hand C. A mouse finding food in the kitchen of a house D. A mockingbird singing the song of a different species E. A chimpanzee finding its way through a forest
Give an example of a coenzyme
What will be an ideal response?
During nervous-system development in Drosophila, the membrane-bound protein Delta acts as an inhibitory signal to prevent neighboring cells from developing into neuronal cells. Delta is involved in ______________ signaling
(a) endocrine (b) paracrine (c) neuronal (d) contact-dependent