The SMART in SMART goals stands for: 

The SMART in SMART goals stands for: 

A key reason the RNA world hypothesis is widely accepted is that RNA can:

A biologist observes a protist moving and capturing prey using temporary extensions of cytoplasm. These structures are called:

Which of the following characteristics is most useful for distinguishing protists from bacteria?

Which observation would provide the strongest evidence that a protist belongs to the Excavata?

Which of the following events most directly contributed to the rise of aerobic cellular respiration?

Which of the following would provide the strongest evidence that two populations belong to the same biological species?

Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. The Chlorella provide their hosts with glucose and oxygen, and P. bursaria provides its Chlorella with protection and motility.   Which term best describes the symbiotic relationship of well-fed P. bursaria to Chlorella?

Which of the following provides the strongest evidence supporting the endosymbiotic origin of chloroplasts?