Luciferin is a molecule that, when broken down in fireflies, produces heat and light. the rate a which luciferin is broken down in cells is controlled by: 1. a carbohydrate 2. a simple sugar 3. an enzyme 4. a complex fat me asap! i need the answer now i don't understand this! this is regions science!

Enzymes

Explanation:

Enzymes are the biocatalyst that serves to speed up the rate of chemical reactions by lowering down the required activation energy. They are proteins and are not used up during the reactions. Breakdown of luciferin is also regulated by the enzyme. Carbohydrates and fats serve as energy source mainly. Simple sugar is also a carbohydrate and serves as an energy source.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.