There are trillions of cells within the human body, many of which are specilalized to perform specific functions. Red blood cells contain no nucleus or other organelles so allowing room for the oxygen carrying haemoglobin, smooth muscle cells are elongated and can shorten to allow for muscle contraction. Within all cells (except the RBCs) are organelles such as the nucleus and mitochondrion, and these organelles perform functions that are essential to life.
The correct answer is A. They ensure that the ecosystem is not stripped entirely of its vegetation
Answer:
Different groups of bacteria help in the cycling of nitrogen , carbon and phosphorus by chemical fixing or releasing in environment.
Explanation:The ecosystem contains flow of energy and cycling of minerals.
In the cycling of minerals, the micro-organisms help in fixing atmospheric nutrients e.g., nitrogen fixation by some bacteria and release the nutrients to the environment by decomposition of organic matters.
Different groups of bacteria help in the cycling of nitrogen , carbon and phosphorus by chemical fixing or releasing in environment.
This statement should be true, hope this helps!!!!!
Spinal tissue should be the answer.
