Answer:
The correct answer would be active transport by proteins.
When a molecule is transported against the concentration gradient it requires cellular energy and the process is termed as active transport.
The energy is either provided by the hydrolysis of the ATP (adenosine triphosphate) in primary active transport or by the electrochemical gradient in secondary active transport
Active transport takes place with the help of integral membrane proteins or transport proteins which form carriers or channels across the membrane.
Examples may include a sodium-potassium pump, uptake of glucose in small intestine et cetera.
These are always that B. nonhuman life in an urban ecosystem differs from that in an undeveloped forest ecosystem. That is the correct answer.
its geocentric cause Ptolemy supported the idea of the geocentric model
Answer:
What are sex cells called?
Answer:pencil life cycle is way different because as you know they make pencils from wood which is trees so they have to grow the trees first.
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