The first stage of cellular respiration is glycolysis, which literally means “sugar splitting.” Look at the diagram.

The diagram shows two units of ATP breaking down a six-carbon sugar molecule. Then, 2 units of NAD+ are converted to 2 NADH and 4 ADPs are converted into 4 ATPs, and the carbon atoms, which now make up a new substance, move on to the Krebs cycle.

When glucose, a 6-carbon sugar, is broken down during glycolysis, what product forms?

A. 2 molecules of lactic acid, C3H6O3
B. 3 molecules of ethanol, C2H5OH
C. 2 molecules of pyruvic acid, C3H4O3
D. 6 molecules of carbon dioxide, CO2

b

Explanation:

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

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.