Because technically they are not living organisms. - they are only composed of proteins and DNA, the way they reproduce is unlike any organism (DNA injection),they cannot be killed with normal biological agents(antibiotics)
Answer:
b. "I will begin doing exercises to strengthen the muscles of my back."
Explanation:
The teaching has been effective when the patient states "I will begin doing exercises to strengthen the muscles of my back." because by doing so, the muscles that support his back will be strengthened, which will help him to maintain a correct posture and to make fewer efforts when lifting thing. He should not lift things above the level of his elbows even if he keeps him back straight and bends his knees and hips to lift.
Answer:
Explanation:
The conversion of nitrogen gas (N2) into nitrates and nitrites through atmospheric, industrial and biological processes is called nitrogen fixation. Atmospheric nitrogen must be processed, or "fixed", into a usable form to be taken up by plants. Between 5 and 10 billion kg per year are fixed by lightning strikes, but most fixation is done by free-living or symbiotic bacteria known as diazotrophs. These bacteria have the nitrogenase enzyme that combines gaseous nitrogen with hydrogen to produce ammonia, which is converted by the bacteria into other organic compounds. Most biological nitrogen fixation occurs by the activity of Mo-nitrogenase, found in a wide variety of bacteria and some Archaea. Mo-nitrogenase is a complex two-component enzyme that has multiple metal-containing prosthetic groups.[22] An example of free-living bacteria is Azotobacter. Symbiotic nitrogen-fixing bacteria such as Rhizobium usually live in the root nodules of legumes (such as peas, alfalfa, and locust trees). Here they form a mutualistic relationship with the plant, producing ammonia in exchange for carbohydrates. Because of this relationship, legumes will often increase the nitrogen content of nitrogen-poor soils. A few non-legumes can also form such symbioses.
Answer: The DNA remains in the cell nucleus but the production of the protein occurs in the cytoplasm
Explanation:
Answer:
The correct answer is B.
Explanation:
The fibroblast is a dynamic cell, which exerts tissue functions at the local level and the immune system. Among its main functions is the formation of connective tissue fibers called collagen and elastin; The fibroblast performs other equally important roles such as: The production and maintenance of the fundamental substance in which its fibrous products are embedded, it has the ability to synthesize and phagocytize collagen and extracellular matrix components in connective tissue remodeling processes.