Which of the following statements is correct?
a. most animal phyla belong to the clade radiata.
b. eumetazoans have three embryonic tissue layers.
c. the origin of all extant animal phyla can be traced to the cambrian explosion.
d. all animals share a common ancestor.
e. sponges are diploblastic animals.

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

What is the role of the phospholipid belayer in cellular transport in living cells

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis