The first known single-celled organisms appeared on Earth about 3.5 billion years ago, roughly a billion years after Earth formed. More complex forms of life took longer to evolve, with the first multicellular animals not appearing until about 600 million years ago.
The answer is Monosaccharide
The following are the environmental factors that can damage genes that code for these enzymes. radiation from sun, various chemicals and x-rays. these agents are referred to as environmental mutagens. they result to changes in the genetic make up of the organism and in turn affect the production of enzymes. enzymes are protein in nature and once the DNA has been compromised their production is affected. in most cases mutated DNA produces enzymes with lost or abnormal function.
Answer:Here are 3 answers!!!
Which body part does a flatworm first use to catch its prey?
Pharynx
Which characteristic of a flatworm's digestive system allows the flatworm to distribute nutrients to all body cells?
A branched gastrovascular cavity
Why do all cells need to receive their own sup[ply of glucose?
Glucose is needed for cellular respiration
Explanation:
