Answer:
D) They can increase the reaction rate for a given reaction by a thousand-fold or more.
Explanation:
Enzymes are like catalysts with the only difference that they are bio-molecules. Biochemical/chemical reactions are slow because of 'transition state barriers' which require a lot of energy to overcome so enzymes rather than overcoming transition state barrier provide an alternate pathway for biochemical reactions which require comparatively less energy. Thus presence of an enzyme leads to an increase in reaction rate because alternate pathway which requires less energy makes the rate of chemical reaction rapid by a thousand-fold or more. 
 
        
             
        
        
        
Explanation:
50%; homozygous recessive; phenotype
According to the Punnett square, offspring from these two parents have a <u>50%</u>chance of inheriting two b alleles. Individuals that inherit two b alleles are <u>homozygous recessive </u>. Inheriting two b alleles confers the <u>phenotype</u> of blue eyes.
Inheritance describes the way in which certain traits are passed onto offspring of sexual reproduction. For instance, co-dominance, both of a gene's alleles are present, and notable in the phenotype.
The nucleus is a large membrane-bound organelle that houses the genetic information, DNA, in the cell. Sequences of DNA make up genes which can have different forms called alleles and comprise the genotype. DNA is transcribed into mRNA and later translated into amino acids which are linked together by rRNA to form proteins. These proteins, when expressed, are referred to as an organism's phenotype.
Learn more about transcription at brainly.com/question/11339456
Learn more about DNA and RNA brainly.com/question/2416343?source=aid8411316
Learn more about proteins and carbohydrates at brainly.com/question/10744528
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-autotrophic bacteria give off oxygen (O2)
-flavor foods such as vinegar, yogurt, cheese, etc. (pasteurization) 
-decomposers (bacteria)- recycle nutrients in food web
-enviromental clean-up- bacteria eat oil from oil spills
0health and medicine- bacteria break down food in your intestines/make
        
                    
             
        
        
        
A.
the amount of carbon dioxide and other carbon compounds emitted due to the consumption of fossil fuels by a particular person, group, etc.
        
                    
             
        
        
        
A hypothesis is an observation made by a scientist that can be tested over to be proven true or false