B. <span>Only human cells have the complementary receptors that bind to surface molecules found on the bacteria.</span>
Answer:
The Viking tubing is meant to be the cell membrane. Glucose manages to move out of the bag and into the surrounding water but starch does not. Not all substances can pass through the cell membrane; some molecules, like starch are too large. The cell membrane is called selectively permeable because of this.
Explanation:
Things like littering. Some people fish with toxic equipment, or leave their nets just floating in the water which can choke some ocean animals. There's global warming, which doesn't even need to be directly near the ocean. Pollution in general heats up the planet making the ice melt, drowning polar bears and penguins.
Explanation:
They are activated when GTP replaces the GDP and are inactivated when the intrinsic GTPase activity hydrolyzes the GTP.