8. Muscle fatigue and soreness may result when..

a. ATP consumption equals
ATP production.

b. ATP consumption is less than ATP production.

C. ATP consumption exceeds ATP production.

d. All of the above

D - All of the above

Explanation:

All of these occur for muscle fatigue

hope it helps!! :)

Morula

Explanation:

The general meaning of  blastocyst is a hollow cavity and thus it is the correct term which defines a hollow cellular mass that develops with the first week of fertilization. While morula is the stage in embryogenesis that comes before the blastocyst stage but at this stage there are 16 undifferentiated solid cells  therefore Morula is incorrect choice for this answer.

Fetus is  an advanced stage of embryo and thus it is also incorrect.  

Placenta is a tube which connect the fetus with the mother for exchange of food and nutrition. Thus it is also incorrect