Enzymes are specialized proteins that speed up chemical reactions, biological catalyst.
Answer:
It is the sun in most ecosystems as the light energy is fixed during photosynthesis and then transferred to other organisms via the food chain.
Explanation:
Answer:
because to irrigate you need purified or rain water to not kill your plants/animals and once you've used your fresh water how would you get more purified water?
Answer: mRNA is made in the nucleus
Explanation:
The answer for this question would be Integument, digestive, respiratory and urogenital.
The largest system that contact with the external environment would be integument and digestive. That makes two system has normal flora of microbes and not sterile like the other systems. Normal flora of microbes will prevent the pathogen microbe grows so it gives some benefit.
