I think it is repeatable, testable, observable
        
             
        
        
        
Answer:
The enzyme you will be studying in this experiment is lactase, and the reaction it catalyzes is the hydrolysis of the disaccharide lactose into the monosaccharides galactose and glucose.
Explanation:
 
        
             
        
        
        
Answer:
There are two categories of these factors: abiotic and biotic. Abiotic factors are the non-living parts of the environment that can often have a major influence on living organisms. Abiotic factors include water, sunlight, oxygen, soil and temperature.
Explanation:
Biotic factors are interactions associated with living organisms. They can also influence the distribution of organisms in an ecosystem. grazing - too little leads to dominant plants outcompeting other species, too much reduces species numbers overall. Both decrease biodiversity.
Abiotic factors affect the ability of organisms to survive and reproduce. Abiotic limiting factors restrict the growth of populations. They help determine the types and numbers of organisms able to exist within an environment.
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Answer: (Structure) mRNA: always single stranded, rRNA: single stranded, twisted upon itself in some regions, tRNA: cloverleaf-like structure
(Function) mRNA: carries the information in the DNA to the ribosomes where it is translated into amino acids of proteins, rRNA: helps assemble tRNA, mRNA, and amino acids to form the polypeptide chain during protein synthesis, tRNA: acts as an adaptor molecule, which identifies correct amino acids corresponding to the anticodon present on it
Explanation: Plato, you're welcome 
 
        
             
        
        
        
An algal bloom has drained the lake of oxygen.
Explanation:
The possible cause of the fish death in the lake near the park is that an algal bloom has drained the lake of oxygen. 
The green slime on top of the lake are the growing algae. 
- This condition is caused by eutrophication. 
- It occurs when nutrients are enriched in a water body causing the growth of algae. 
- Algae bloom causes the depletion of oxygen levels in the ocean. 
- They block off plants from producing oxygen and enriching water with it. 
- Fishes need oxygen for their life actions. 
learn more: 
Algae brainly.com/question/1739812
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