During neurulation, from which embryonic tissue does the neural tissue develop?Group of answer choicesEndodermMesodermEctodermAll of the above

When the brain develops from the embryonic neural tube,which of the following portions develops third?

In a vertebrate animal, all of the connective tissues are derived fromMultiple choice question.the embryonic ectoderm.the embryonic endoderm.the embryonic mesoderm.

In the course of embryonic development, the three germ layers -- ectoderm, mesoderm, and endoderm -- give rise to different tissues and organ systems in the body. Which of the following options is formed from the endoderm?Group of answer choicesDigestive tract.Skeletal system and muscle.Heart and blood vessels.Nervous system and skin.

Which embryonic germ layer(s) give(s) rise to connective tissues?Multiple choice question.The endodermThe mesodermThe endoderm and the ectodermThe mesoderm, the ectoderm, and the endoderm

Neural crest cells participate in the development of which of the following?Multiple choice question.Many different structuresOnly nervous tissueOnly heart muscleOnly the endocrine syste