Which of the following cannot be the result of punctuated equilibrium?

1. extinction and coevolution

2. adaptation and speciation

3. stasis and expansion

In which part of the body is a ball-and-socket joint found?

Which of the following is an example of competition a. the leaves of a tree prevent a small shrub from getting sunlight. three species of birds feed a different heights in the same tree. b. three species of birds feed at different heights in the same tree c. zebra and giraffe’s feed on different grassland plants d. cats living in two different homes eat the same brand of cat food.

Interferons play a vital role in the immune system why are interferons so important?