An example of a parallel choice on a dichotomous key is happy or sad and old or young. Either one of those answers.
Answer:
proteins, nucleic acids ,and carbohydrates can form from all elements
Explanation:
Answer:
The answer is A. It is expensive to produce and transport
Explanation:
What is the role of water in the photosynthetic process? Water splits into oxygen, hydrogen ions, and electrons to replace the lost electrons of photosystem II in the light dependent reaction. Also as hydrogen ions pass through ATP sythase, ATP is formed to use in the light independent reactions.
Explanation: Bacteria are needed in the nitrogen cycle because plants and animals cannot directly use atmospheric nitrogen. Bacteria in the roots of plants trap nitrogen and convert it to ammonia and other nitrogen compounds which plants can then use to make protein
