Secondary succession occurs when a disturbance does not destroy, but still significantly alters all local organisms True O False Question 22 One of the impacts that may be observed in following the introduction of zebra mussels is a higher number of dead birds True False Question 23 When looking at a phylogenetic tree, one would expect to see birds closer to crocodiles than to sharks. True False Question 24 Zebra Mussels are called an invasive species because they invade pipes and other human made structure True False Question 25 Carrying capacity is reached when physical, chemical or biological characteristics limit population growth True False Question 26 The introduction of wolves in Yellowstone Park led to a higher consumption of vegetation by deer and elk True False Question 27 Survivorship curves similar to that of humans, where more deaths are observed at older ages, are seen in most species True False 20 (2 intal