Active transport requires energy when moving molecules against a concentration agent. It requires for specific membrane transport proteins. Only a certain type of protein can move a certain type of substance.
The three main types of Active Transport are:
1) Sodium-Potassium Pump
2) Endocytosis
<span>3) Exocytosis </span>
Lipids are essential for all life on Earth. They play many important roles in maintaining the health of an organism. Arguably the most important function lipids perform is as the building blocks of cellular membranes. Other functions include energy storage, insulation, cellular communication and protection.
ANSWER:⇒ cork
People struggled to believe that some of Hooke's images were real because they were so strange and remarkable! Hooke noticed tiny boxlike spaces in cork under his microscope, which he depicted and characterized as cells. Plant cells have been discovered by him!
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Answer:
nitrogen fixation is the answer
