Too much logging in the oyamel fir forests could lead to the eastern monarch butterfly going extinct because a.. the entire population of the species spends winter in oyamel. c.. the winters are too cold in oyamel. b.. the butterflies breed in the oyamel fir trees. d.. the butterflies feed on the oyamel fir trees.

The answer is letter A. The entire population of the species spends winter in Oyamel

Oyamel is one of the most popular places where Monarch butterflies would breed over winter season. But because of deforestation and climate change there was a big decline on the number of monarch butterflies going to Mexico and back over the past few years.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.