Choose the One Best Answer for Each Numbered Item

question 7

Multiple Choice

Choose the one best answer for each numbered item.
-Gray crescent

• A)Visible marker of the site where an amphibian's body axis will be established and where gastrulation will begin
• B)The formation of 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)Programmed cell death, as occurs in the formation of the mouse paw