Which of the following statements concerning animal gastrulation is correct?Group of answer choicesCells from the blastomere cannot become mesodermal cells.Three germ layers are created; the endoderm, mesoderm and epidermis.The endoderm develops into the gut and lungs.The mesoderm develops into the muscles and nervous system.

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

Which are true statements about gastrulation?Check All That ApplyIt establishes the basic body plan of the embryo.It establishes the basic body plan of the embryo.Four germ layers arise.Four germ layers arise.Three germ layers arise.Three germ layers arise.The pattern is variable between species.The pattern is variable between species.Yolk is not a major factor in establishing the pattern.Yolk is not a major factor in establishing the pattern.It involves changes in cell shape.It involves changes in cell shape.It involves cell movement.It involves cell movement.

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

In birds, cells that migrate through the primitive streak into the interior of the embryo become which of the following germ layers?Multiple choice question.Mesoderm or ectodermEctoderm or endodermEndoderm or mesoderm