Answer:
Fishing down the food web is the process whereby fisheries in a given ecosystem, "having depleted the large predatory fish on top of the food web, turn to increasingly smaller species, finally ending up with previously spurned small fish and invertebrates".
 
        
             
        
        
        
Answer:
Producers are the foundation of a food chain. 
Explanation:
 They provide energy for all of the consumers in an ecosystem.
 
        
             
        
        
        
The answer is 3:1.
If we imagine that plant has two alleles for the
trait, we can dominant allele represent with P represents and recessive allele with p. To get purebred monohybrid in the first generation, parents must be a dominant homozygote (PP) and a recessive hetero<span>zygote (pp):
Parental generation: PP   x   pp
The first generation: Pp  Pp  Pp  Pp
Pp represents a heterozygote.
If we cross these heterozygotes:
The first generation: Pp   x   Pp
The second generation: PP  Pp  Pp  pp
If dominant allele determines the phenotype, there will be 3 plants (one PP and two Pp) with one phenotype and only 1 plant </span><span>(pp)</span> with another phenotype and vice versa.
        
                    
             
        
        
        
Answer:
A higher amount of carbon dioxide in the atmosphere leads to higher global temperatures, which then results in thermal expansion of seawater and melting of glaciers and ice sheets.
Explanation:
 
        
             
        
        
        
The organs for digestion, excretion, and reporduction arelocated in the 
Abdominal cavity