Answer:
Radiation and mutations can cause changes in the DNA but there arent substances. Ribonucleic acids can cause errors if they match with the wrong acid.
Answer: Abiotic factors in a tropical rainforest include temperature, humidity, soil composition, air, and many others. A few of the many biotic factors in a rainforest would include toucans, frogs, snakes, and anteaters.
Explanation: abiotic factors are non-living things. biotic factors are living things. they both impact the organism living in the environment. remember all biotic factors are dependent among abiotic factors.