Which of the following statements is consistent with the assertion that protists are paraphyletic?

a. protists all share a common set of synapomorphies
b. protists are all having more primitive characteristics than land plants and animals
c. multiple protist lineages evolved into complex eukaryotic groups (e. g. animals, plants, fungi)
d. protists do not share a single common ancestor

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

If the dimensions of a cube-shaped cell with a length,height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6

People with one sickle cell allele are not likely to get malaria. what is this an example of?