Transport of a substance from the lumen (cavity) of an organ into one side of a cell and out the other side of the cell into the extracellular fluid is called <u>transcellular transport</u>.
The two routes of transport of substances across the epithelium of the gut are by transcellular method and paracellular method.
Transcellular transport refers to the transport of solutes across a epithelial cell layer through the cells. The best example is the movement of glucose from the intestinal lumen to the extracellular fluid by the epithelial cells. The epithelial cells use the active transport to generate the transcellular transport. Active transport refers to the transport of substances from a region of its lower concentration to a region of its higher concentration against the concentration gradient using cellular energy.
Oxygen.
Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.
Well maybe that species evolved over time to get faster and be more durable because of the need to run away from lions and other prey.
Answer:
When a species of mosquito or insect is resistant to any chemical, it is good for the species of the mosquito because it does not kill it, but if it seeks to combat it in crops or in human environments it is dangerous.
Explanation:
Whenever a mosquito or a species is resistant to a chemical, it means that it has an adaptation mechanism so as not to die, as it did before, against that chemical.
