Cleavage as part of embryonic development is distinctive because it involves ________.

Examine the evolutionary tree below. this tree tells us that the amnion is found in ______.

In a comparison of birds and mammals, having four limbs is _____.

In a newly fertilized egg, the vitelline layer _____.

In fetal circulation the descending aorta carries the less oxygenated blood from the _________.

The first stage of embryonic development is _____. this process produces _____.

Replication of the bacterial ________ is required before the bacterial cell can be duplicated..

Prokaryotes are associated with important ecological functions such as _____.

Primarily, cellular respiration serves to _____..

In amphibians, gases are exchanged through the gills, lungs, and/or _______________. ..

During _________, nucleotide sequence information is changed into amino acid sequence information.