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.RegulativeDeterminateIntermediateMosaic

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

Mammals exemplify this type of development.Multiple choice question.RegulativeMosaicSporadicDeterminate

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

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

Which is a true statement about regulative development?Multiple ChoiceEarly blastomeres are committed to the development of a specific type of tissue.If an embryo splits in two, identical twins result.Body form is determined by cell fates genetically predetermined in each cell.Only invertebrates exhibit regulative development.