Which of the following is not true of marshes, swamps, and bogs?
a.
they can be seasonal or permanent.
b.
they have very little groundwater.
c.
they can be very important to migrating animals.
d.
they are considered the most biodiverse ecosystems.

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.