Which of the following is the first major event in animal development?Multiple choice question.GastrulationCleavageFertilizationOrganogenesis

Which occurs during embryonic development immediately after fertilization?Multiple choice question.MorphogenesisGrowthDifferentiationCleavage

From earliest to latest, the correct sequence in early development proceeds as follows:a) fertilisation – cleavage – gastrulationb) cleavage – ovulation – organogenesisc) gastrulation – cleavage – morulad) cleavage – organogenesis – gastrulation

Multiple Choice QuestionIn terrestrial animals, the last step of fertilization is the Blank______.Multiple choice question.fusion of nucleicleavageblastulationegg activation

The division of the animal body into repeated parts is calledMultiple choice question.protostome development.deuterostome development.gastrulation.segmentation.

The discovery of genes that contribute to embryonic development began a new field of biology calledMultiple choice question.comparative morphology biology.population demography.evolutionary developmental biology.molecular cellular biology.