Exam 42: Animal Development

Classification.Respond to the following statements in reference to the four kinds of social behavior listed below. a.altruism b.cooperation c.selfish herd behavior d.subordination -In 2009, Nadya Suleman, gave birth to

Gastrulation is controlled by signal-sending cells that cause movement of neighboring cells and this is called __________.

Which of the following statements is false?

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 -animal pole

Which of the following diffuses in greater amounts from the fetal blood to the mother's blood?

Adequate intake of ____ by a mother-to-be before and during early pregnancy may reduce the risk of spina bifida and other serious neural tube defects.

Which of the following is FALSE regarding morphogens?

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 -fertilization

Which of the following human extraembryonic membranes forms the urinary bladder?

A human embryo does not experience apoptosis.What unusual features would be found on the newborn?

All of the following are true of every cell of the early human embryo EXCEPT that

Which of the following human extraembryonic membranes is the first site of blood cell formation and the source of germ cells?

Which of the following systems is the first to begin development in the human embryo?

Smoking tobacco regularly during pregnancy results in all EXCEPT

Use the figure above to answer the following questions. -The letter "C" from the above figure represents

Cleavage produces a __________ stage cell.

Homeotic genes

The following questions refer to the figure above illustrating frog development. -Apoptosis is occurring at

__________, products of master genes, act as long-range signals that diffuse out from a source and form a concentration gradient.

Classification.Respond to the following statements with reference to the five terms below. a.somites b.blastomeres c.ectoderm d.mesoderm e.endoderm -This is the first primary tissue layer to form.