During which period did mammals first appear?

a.

Pleistocene

b.

Carboniferous

c.

Cretaceous

d.

Jurassic

How are slumps and slides different?

Why do the finches of the Galápagos Islands have different beaks

In the traditional phylogeny (a), the phylum platyhelminthes is depicted as a sister taxon to the rest of the protostome phyla and as having diverged earlier from the lineage that led to the rest of the protostomes.

Which of the following are you most likely to experience? A - total solar eclipse B - total lunar eclipse C - full moon D - partial lunar eclipse

Cytochalasins bind actin and block actin microfilament assembly. Cells treated with cytochalasins will not divide. How do cytochalasins block cell division? OCytochalasins prevent the contractile ring from forming and dividing the cell in two.

The ovaries are located in the ___ cavity.

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. Eliminate C) osmosis. D) a passageway.

As ocean water in a tide pool warms and evaporates, the remaining water becomes a. cooler. b. saltier. c. calmer. d. darker.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.