Epithelial-mesenchymal transition (EMT)
: The epithelial-mesenchymal transition (EMT) is a process by which epithelial
cells lose their cell polarity and cell-cell adhesion, and gain migratory and invasive
properties to become mesenchymal stem cells; thes
1) When the temperature of the outside air exceeds their internal body temperature,
jackrabbits living in hot, arid lands will
A) dilate the blood vessels in their large ears to transfer more body heat to the
B) constrict the blood vessels in
1) Gas exchange in the aquatic salamander known as the axolotl is correctly
A) active transport to move oxygen into the salamander from the water.
B) carrier-mediated transport to move oxygen into the salamander from the water.
1) Both animals and fungi are heterotrophic. What distinguishes animal heterotrophy
from fungal heterotrophy is that only animals derive their nutrition by
A) preying on animals.
B) ingesting it.
C) consuming living, rather than dead, prey.
D) using enzym