A blastomere is a _____ and a blastocyst is _____.

As cleavage continues, a zygote forms into a solid multicellular ball called a(n) _____.

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 _____.

The ________ helps keep food between the grinding surfaces of the teeth during chewing...

Sodium permeability refers to a property of ________...

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 _____..