If you separate the blastomeres of a sea urchin, since their developmental path is not predetermined, each blastomere can become a complete sea urchin. What sort of development is this?Multiple choice question.MosaicRegulativeIntermediateDeterminate

In sea urchins, the process of fertilization produces a(n) _____.

The Giant Red Sea Urchin and the Purple Sea Urchin cohabit the rocky intertidal zones along the western United States and cannot interbred because their gametes are genetically/chemically incompatible. This is an example of which of the following?Multiple choice question.Behavorial isolationPostzygotic isolationPrevention of gamete fusionEcological isolation

After gastrulation in sea urchins, identify the cells that remain on the surface.Multiple choice question.MesodermEndodermEctodermBlastocyst

In determinate development,Multiple choice question.if one cell is removed from the embryo, the cell that is removed can develop into a complete embryo.if one cell is removed from the embryo, development of the remaining cells will continue to form a complete embryo.the cells differentiate into tissues late in embryonic development.the cells differentiate into tissues early in development.

If biological species are defined in terms of reproductive compatibility, which of the following factors determines the formation of a new species? Group of answer choicesgene flowgene flow expansionhybrid formationreproductive isolation