A virus is basically a shell of DNA. It floats around until it finds a cell to latch onto. It then tricks the cell into absorbing the virus and the virus unleashes the DNA its carrying telling the cell to quit doing its job, and make more of the virus. <span />
I truly believe the answer is choice A.
True, our ecosystem is not independent. Everything depends on everything else to survive. :)
Answer:
hope it will help you
Explanation:
For instance, carbohydrates are broken down by amylase, sucrase, lactase, or maltase. Proteins are broken down by the enzymes pepsin and peptidase, and by hydrochloric acid. Lipids are broken down by lipases. Breakdown of these macromolecules provides energy for cellular activities.
When we ingest food, we ingest several types of organic macromolecules that we use for nutrition and energy. These macromolecules are carbohydrates, proteins and lipids.
The stem supports the plant and because of the stem the plant is able to grow taller if needed
