Ans:
Please read the explanation section.
Explanation:
Vegetative propagation does not require seeds or spores to produce offspring. In this propagation, offspring grow from a specific part of the parent plant. In different plants, vegetative propagation happens in different ways. Here are a few examples.
- Garlic, onions, and tulip plants all reproduce using genuine bulbs/true bulbs. These short covered stems are also called scaly bulbs because it has many layers. 
- Crocuses reproduce using corms. Corms are similar to genuine bulbs. But, a corm doesn’t have as many layers as true bulbs.
- Potato plants reproduce using tubers. These underground growths propagate new plants from stems or growing points, which is called eyes. 
- Ginger plants reproduce using rhizomes. These stems are those which grow sideways along with the soil or just below the surface. 
- Strawberry plants reproduce using stolons. Stolons are looking like branches growing along the ground.
 
        
                    
             
        
        
        
Answer:
The beating or fanning movements of three pairs of maxilliped flagella in crabs and crayfish modify exhalent gill currents while drawing water over chemoreceptors on the head. They play an integral part both in signalling by distributing urine odours, and in active chemosensation.
Explanation:
 
        
             
        
        
        
Hypothesis is what you think will happen before the experiment, it isn't necessarily backed up by any sources or evidence. A scientific law is the observation of a phenomenon and a theory is the explanation both can be used together to back each other up.
        
             
        
        
        
Passive transport:
For simple diffusion = fatty acids, amino acids, steroid hormones (because they’re non-polar)
Facilitated diffusion = N2 and Cl-