A prairie grass may experience grazing herbivores, wildfires, ...

[armygirl]

A prairie grass may experience grazing herbivores, wildfires, droughts, deep snow, or blazing hot days in the summer. Yet, those prairie grasses alive today are descendants of those that have survived these challenges and more.
 
  From an evolutionary perspective, these sorts of environmental challenges are identified as A) herbivory.
  B) predation.
  C) selective pressures.
  D) reproductive isolation.

Question 2

The pollination of an orange tree's flowers by honeybees best illustrates
 
  A) amensalism.
  B) parasitism.
  C) commensalism.
  D) mutualism.

[dominiqueenicolee]

Answer to Question 1

C

Answer to Question 2

D

[armygirl]

Gracias!

[Bigfoot1984]

Thanks for the timely response, appreciate it