Is there other life in outer space? what life is it?

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Which anatomical feature would you expect to find in the fossil remains of a nocturnal species?

In the diagram, δgef and δhef are congruent. what is the value of x?