In our bodies, glycolysis is able to take place in both the presence and the absence of oxygen. when oxygen is present, pyruvate is the end product of glycolysis. what is the end product of glycolysis when oxygen is not present?

lactate

glucose

adp

atp

Option A: Lactate

Explanation:

In the absence of oxygen, anaerobic respiration takes place and pyruvate is converted to lactate to regenerate NAD+ for glycolysis to produce energy as the oxidative phosphorylation is unable to occur in the absence of oxygen

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

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.