Facilitated diffusion. Facilitated diffusion is a form of passive transport across the plasma membrane (therefore needs no external energy source), that allows polar or larger molecules that usually couldn't diffuse across the membrane to do so.
Answer:
Which of the following is not something organisms directly compete for in an ecosystem?
elevation is not directly competed for other than food, water, and mineral nutrients that are necessities which an organism depend on
Explanation:
Answer:
Ammonia
Explanation:
Nitrogen fixing bacteria turn nitrogen into ammonia and plants can absorb it
Hope this helps :)
Answer:
Respiratory
Explanation:
Red blood cells pick up oxygen in the lungs.
The ocean currents resemble conveyer belts and move constantly but recently the ice caps have melted more and more leaving nothing but warm water to be distributed to the oceans because man is polluting the air and creating toxins and such leading to the changes in the ocean, also the amount of trash we dispose of in the ocean is causing the water to be untreatable because loads of chemicals are being released and filters cant filter them out