Well, it's obvious, because without a transport system, cells wouldn't have the nutrients and things they needed!! And waste wouldn't be able to circulate out of cells.
It’s b because its shown in the question read it again ,and you’ll see
<h2>Evolution of Earth</h2>
Explanation:
The events of earth history from oldest to new are as follows:
- Earliest evidence of life on Earth.
- Production of oxygen by photosynthetic organisms.
- Origin of Eukaryotic cell.
- appearance of first tetrapods on land.
Scientists assume that the Earth evolved about 4.6 billions years ago. However, the first evidence of life dates back to 3.7 billion years ago. It is assumed that the conditions of primitive Earth were such that it could not support life. However the inorganic compounds spontaneously reacted and gave rise to biological molecules such as amino acids, proteins lipids etc.In this way the first cells appeared as prokaryotes, photosynthetic prokaryotes began to produce oxygen and gradually new forms of life arose.
An important event in the history of Earth is cambrian explosion during which several forms of life arose and diversified to occupy various strata of Earth.
Answer:
Anabolism builds molecules required for the body's functionality. The process of catabolism releases energy. Anabolic processes require energy. ... Examples of catabolic processes are proteins becoming amino acids, glycogen breaking down into glucose and triglycerides breaking up into fatty acids.