An enzyme lowers the activation energy of a reaction so it can take place within living organism, so an enzyme is a biological catalyst.
It helps in metabolic processes like synthesis of lipid, phospholipids and steroids.
<span>(According to Reference)
Whereas an onion epidermal cell has a cell wall, a human cheek cell does not. Instead, a semi-permeable membrane surrounds the cytoplasm of the cheek cell. While there are chloroplasts present in onion cells, they are absent in cheek cells. </span>
Some plants have a complex life cycle that includes the sporophyte and,gametophyte stages.
Answer:
A system for growing food without using much land
Explanation:
Please mark brainliest and have a great day!
