Exam 42: Animal Development

Classification.Respond to the following statements with reference to the five terms listed below. a.zygote b.blastula c.cleavage d.gastrula e.somites -This is a longitudinal series of paired segments.

Which of the following does NOT occur in the first trimester during human development?

Use the figure above showing developmental day 14 to answer the following questions. -The cavity of the sac that will directly enclose the embryo is indicated by

Classification.Respond to the following statements with reference to the five terms listed below. a.zygote b.blastula c.cleavage d.gastrula e.somites -This is the division of the zygote.

Which of the following gives rise to the embryo during human development?

What would happen if human chorionic gonadotropin levels did not rise adequately during pregnancy?

Which of the following is the final stage of the prenatal period?

The female hormones that participate in milk production for and delivery to the newborn are

The explanation for the differences between a human liver cell and a cell from the skin is the

Is a mutation more likely to be lethal if it impacts early or late stages in development?

The hormone ____ is involved in a positive feedback cycle that results in strong uterine contractions during labor.

MATCHING Matching.Choose the one best answer for each numbered item. a.visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin b.the formation of two or three embryonic tissue layers c.the fusion of male and female nuclei d.the entire body divides transversely; each half grows and regenerates the missing part e.selective gene expression results in different cell types f.subdividing of the zygote by mitosis; no growth occurs g.region of zygote that has less yolk and is pigmented h.an embryonic stage of development that has three primary tissue layers before organogenesis begins i.the formation of organs j. one body part develops in response to signals from an adjacent part k.the growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results l. occurs in the formation of the human hand -controlled cell death

Classification.Respond to the following statements with reference to the five terms below. a.somites b.blastomeres c.ectoderm d.mesoderm e.endoderm -These reorganize themselves into the gastrula.

MATCHING Matching.Choose the one best answer for each numbered item. a.visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin b.the formation of two or three embryonic tissue layers c.the fusion of male and female nuclei d.the entire body divides transversely; each half grows and regenerates the missing part e.selective gene expression results in different cell types f.subdividing of the zygote by mitosis; no growth occurs g.region of zygote that has less yolk and is pigmented h.an embryonic stage of development that has three primary tissue layers before organogenesis begins i.the formation of organs j. one body part develops in response to signals from an adjacent part k.the growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results l. occurs in the formation of the human hand -gray crescent

In amphibians, the gray crescent appears

MATCHING Matching.Choose the one best answer for each numbered item. a.visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin b.the formation of two or three embryonic tissue layers c.the fusion of male and female nuclei d.the entire body divides transversely; each half grows and regenerates the missing part e.selective gene expression results in different cell types f.subdividing of the zygote by mitosis; no growth occurs g.region of zygote that has less yolk and is pigmented h.an embryonic stage of development that has three primary tissue layers before organogenesis begins i.the formation of organs j. one body part develops in response to signals from an adjacent part k.the growth, shaping, and spatial coordination of tissues and organs so that a predefined pattern of the whole organism results l. occurs in the formation of the human hand -gastrula

Classification.Respond to the following statements with reference to the five terms below. a.somites b.blastomeres c.ectoderm d.mesoderm e.endoderm -These are the source of most bones and the skeletal muscle of the head and trunk.

The change in the developmental fates of different cell lineages in response to signals from adjacent tissues is

Nutrients and antibodies move across the placenta from mother to embryo or fetus, as do __________, which can cause birth defects.

Cleavage produces the