Review the images of the two biomes, the tundra and the taiga. Notice that while there are about 1,700 kinds of plants there are virtually no tree species in the tundra. What are the limiting factors in preventing the immigration of tree species into the tundra? All BUT ONE could apply.

A) rocky, poor soil
B) very short growing season
C) the presence of permafrost
D) winters are six months long

Monarch butterflies have brightly colored orange wings with black patterns on them, making them easily visible to birds that eat butterflies and moths, yet birds rarely eat the monarchs. likewise, the monarch caterpillars are brightly striped yellow and white and black, and they also are rarely eaten by birds, although some wasps will attack them and feed them to their young. what can be inferred from these observations? monarchs must threaten and attack birds, but not wasps. monarchs have a way of discouraging bird predation that does not involve hiding. monarchs’ wings are so colorful that most birds must find them difficult to eat. monarchs lay more eggs than other less conspicuous butterflies.