John is observing a few slides of a human embryo. the first slide shows a neural tube and the second just a compact mass of cells. which phases of human embryos are the slides?
a.)first slide: blastula; second slide: gastrula
b.)first slide: gastrula; second slide: neurula
c.)first slide: neurula: second slide: morula
-plato

What feature of cell theory is best demonstrated in the image

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except