Muscle cells in oxygen deprivation convert pyruvate to and in this step gain
a) lactate atp
b) co2
c) alcohol..atp
d) nad+
e) lactate ..nad+

E) lactate ..NAD+

Explanation:

In conditions of oxygen deprivation, cells can't undergo normal cellular respiration and must rely on other processes to obtain energy.

Muscle cells in particular, under anaerobic exercise, do not obtain enough oxygen to produce the energy needed and end up obtaining energy form a process different than cellular respiration: lactic fermentation.

Lactic fermentation turns a molecule of pyruvate into a molecule of lactate, at the same time it turns NADH into NAD+.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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.