Answer: 3. A food chain follows one path of energy and materials between species. A food web is more complex and is a whole system of connected food chains. In a food web, organisms are placed into different trophic levels.
Explanation: I was unable to answer the first one, but I think I got the 3rd one down. Hope this helps! :)
The CRISPR-Cas system is widely found in bacterial and archaeal genomes as a defense mechanism against invading viruses and plasmids [1–6]. The type II CRISPR-Cas system from Streptococcus pyogenes relies on only one protein, the nuclease Cas9, and two noncoding RNAs, crRNA and tracrRNA, to target DNA [7]
Answer:
the answer is A: solution 1.
Explanation:
Answer:
transports oxygen and carbon dioxide for the respiratory system.
Answer:
B) Available energy decreases as trophic levels increase.
Explanation:
Each time an organism consumes energy, it absorbs it. When it dies the energy is released and only some of it is consumed the organism that eats the first organism. This continues and by the end there is very little energy left because most of it was released into the world.
