How to cut what open? and a mask.
Answer;
-Flagellum (flagella; plural)
Explanation;
-Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea.
-A flagellum is a whip-like structure that allows a cell to move. They are found in all three domains of the living world: bacteria, archaea, and eukaryota, also known as protists, plants, animals, and fungi.
-The primary role of the flagellum is locomotion, but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. Flagella are organelles defined by function rather than structure. Flagella vary greatly. Both prokaryotic and eukaryotic flagella can be used for swimming but they differ greatly in protein composition, structure, and mechanism of propulsion.
The parasympathetic nervous system responds when the body is relaxed and at rest while sympathetic nervous system is responsible for response to emergency situation.
Explanation:
- The sympathetic nervous system is called fight or flight division while the parasympathetic nervous system is the rest and digest division.
- The pre-ganglionic neurons of sympathetic nervous system arises from lumbar and thoracic regions of spinal chord while the preganglionic neurons of parasympathetic nervous system arises from the brain and sacral region of the spinal cord.
- The sympathetic nervous system decreases the activity of digestive system while the parasympathetic nervous system increases the activity of digestive system.
- Sympathetic nervous system dilates bronchioles while parasympathetic nervous system constricts bronchioles.
- Sympathetic nervous system increases blood pressure while parasympathetic nervous system usually do not effect blood pressure.
- Sympathetic nervous system increases heart rate while parasympathetic nervous system decreases heart rate.
Answer:
It has a negative impact on the environment by allowing toxic chemicals to harm wildlife.
Explanation:
Mining refers to the act of extracting minerals and other valuable solids from the earth's crust. The process of mining can have adverse effect on an ecosystem in the sense that wildlife is threatened during the process.
During the mining process, chemicals, which are toxic to living organisms, from the minerals gets washed into the areas surrounding the mining site. Thereby, causing serious harm to the wildlife living in those areas.
Answer:
secondary structure ... hydrogen bonds...
Explanation: Some regions of a polypeptide may coil or fold back on themselves. This is called secondary structure, and the coils or folds are held in place by hydrogen bonds.
