B. Active transport
I don’t really know I’m using it as an answer because transportation and I thought back to the question I do t know I can’t do explanations very well
The difference between them is that an ecosystem is a community of organisms and their environment. And a biosphere is all the living organisms.
It must be based on scientific observations that can be repeated in a controlled setting, would be the correct answer.
Answer:
Hemoglobin, or haemoglobin, abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells of almost all vertebrates as well as the tissues of some invertebrates. Hemoglobin in blood carries oxygen from the lungs or gills to the rest of the body.
Answer:
Plants, animals and bacteria need nitrogen to help them grow. Thanks to the nitrogen cycle, nitrogen gas in the atmosphere gets converted to a form they can use
Explanation: