Answer:
The correct answer is number one: <em>Filamentous rotating structures that provide motility may be singular, paired or scattered.</em>
Explanation:
Flagella are organelles defined by function rather than structure.
The primary function is that of locomotion but also being sensitive to chemicals and temperatures outside the cell.
Helicobacter pylori is a good example of flagella: It uses multiple flagella to propel itself through the mucus lining to reach the stomach epithelium.
Sperm cell is a good example, which uses its flagellum to propel itself through the reproductive tract of females.
I hope it helps!
 
        
                    
             
        
        
        
In order to create a hydroelectric power plant, you need water, hence the prefix hydro-. Most times, people use dams to block the water, which in a way stores it. When you need to produce electricity, you release some of the water which flows through a turbine making it spin, which then activates a generator to produce electricity.
        
             
        
        
        
The ecological succession that occurs in a lava field is as follows:
- Moss and lichen arrive by birds to barren lava field.
- Soil is created.
- Fountain grass grows.
- Monkeypod trees grow.
<h3>What is ecological succession?</h3>
Ecological succession refers to the series of changes that occur in a habitat gradually with new species replacing existing species or a barren habitat until the environment becomes more complex.
A lava field is a barren field where there are no species 
The ecological succession that occurs in a lava field is as follows:
Moss and lichen arrive by birds to barren lava field; Soil is created; Fountain grass grows; Monkeypod trees grow.
Learn more about ecological succession at: brainly.com/question/18240055
 
        
             
        
        
        
Here’s the answer:
Schwann Cells
        
             
        
        
        
A <span>phenotype is the actual physical characteristic of the gene. Its whatever you see.</span>