Which type of organism fits the following description: prokaryotic, unicellular, cell wall is made of peptidoglycan, autotrophs and heterotrophs, reproduce only asexually, some are motile, they precede eukaryotic organisms.

Which of the following correctly describes a hybrid organism?

Beta 1 receptors are found on cardiac muscle, while Beta 2 receptors are found on the lungs (not exclusively, just generally).

Which answer choice correctly describes carrying capacity?

In the food web below, which organism(s) are producers?

Which answer choice below correctly describes coevolution?  

Which of the following descriptions correctly describes the difference between prezygotic and postzygotic reproductive isolating mechanisms?

Which immune response is faster, primary or secondary and why?  

1B.   What are some of the reasons one may want to measure the Noise Parameters of an amplifier in addition to its S-parameters? (check all that apply)

Seasonal changes are due to:  Ex. summer in the southern hemisphere.