Which organism would make the best index fossil? Why ? -ammonite (lived 205-66 million years ago)
-Belemnite (lived 205-66)
-ceratites (lived 205-138)
-nautilus (lived 410 Mya to present)
-teuthids (lived 410 Mya to present)
-goniatite ( lived 310 to 290)

Which type of respiration takes place when there is no oxygen present

In the water cycle , when does water undergo a chemical change

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