A research group claims that they have discovered microscopic fossilized embryos,including some at the blastula stage,but other researchers are skeptical.Finally,one student develops a technique for splitting the embryos in half to reveal the substructure.Cutting open the first blastocyst embryo,the student is very excited."It is a blastula!" she shouts,"Look,you can see the ________ inside!"
A)granulosa cells
B)hollow blastocoel
C)archenteron
D)neural tube

Question

Quizplus · Accepted Answer

A blastula is a hollow ball of cells with a fluid-filled cavity called a blastocoel. Therefore, the structure that the student is likely referring to when she says "you can see the ________ inside" is the blastocoel, making choice B the correct answer. Choices A, C, and D are not correct as they are not structures within a blastula.

A Research Group Claims That They Have Discovered Microscopic Fossilized