2021 发育生物学(天水师范学院)1462964445 最新满分章节测试答案
本答案对应课程为:点我自动跳转查看
本课程起止时间为:2021-03-05到2021-07-15
本篇答案更新状态:已完结
第二章 基本概念 第二章测试
1、 问题:Which of the following is a germ cell?
选项：
A:cells of the gonads
B:intestinal cells
C:sperm and eggs
D:zygotes
答案: 【sperm and eggs】
2、 问题:Which of the following basic developmental processes is most dependent on cellular movements?
选项：
A:cell differentiation
B:growth
C:morphogenesis
D:pattern formation
答案: 【morphogenesis】
3、 问题:A morphogen is
选项：
A:a cell or group of cells that signal other cells to become determined in a specific way
B:a gene that causes a cell or group of cells to adopt a particular shape
C:a signaling molecule that causes the differentiation of neighboring cells
D:a signaling molecule that confers concentration-dependent positional information
答案: 【a signaling molecule that confers concentration-dependent positional information】
4、 问题:What distinguishes stem cells from other cell types?
选项：
A:Although all cell types can divide, only stem cells differentiate after division.
B:Stem cells are able to divide to produce populations of cells that differentiate into a related set of cells.
C:Stem cells divide asymmetrically to give rise to one daughter cell that remains a stem cell, and a second daughter cell that differentiates into one or more cell types.
D:Stem cells have a special type of cell division in which they form small stems that then pinch off to give rise to the daughter cell.
答案: 【Stem cells divide asymmetrically to give rise to one daughter cell that remains a stem cell, and a second daughter cell that differentiates into one or more cell types.】
第三章 脊椎动物生命周期和发育概要 第三章测试
1、 问题:Which of the following is a vertebrate ‘model organism’ used in the study of development?
选项：
A:Drosophila melanogaster
B:Homo sapiens
C:Caenorhabditis elegans
D:Xenopus laevis
答案: 【Xenopus laevis】
2、 问题:The nervous system, heart, and liver are derived from ( ), ( ), and ( ), respectively.
选项：
A:all are derived from mesoderm
B:ectoderm, mesoderm, and endoderm
C:endoderm, mesoderm, and ectoderm
D:mesoderm, ectoderm, and endoderm
答案: 【ectoderm, mesoderm, and endoderm】
第四章 体轴建立 第四章测试
1、 问题: The ‘organizer’ in Xenopus is responsible for
选项：
A:inducing a mesodermal fate in nearby cells
B:helping to pattern the mesoderm along the dorso-ventral axis
C:specifying the dorsal region of the embryo
D:all of these events
答案: 【helping to pattern the mesoderm along the dorso-ventral axis】
2、 问题:A key factor that specifies the organizer in Xenopus embryos is:
选项：
A:GSK-3β
B:Fz7
C:Wnt-11
D:β-catenin
答案: 【β-catenin】
3、 问题:Maternal factors are
选项：
A:the energy-rich yolk present in the eggs of many species
B:the genes contributed to the embryo by the maternal haploid genome
C:the genes expressed by the zygotic genome in the egg
D:developmentally active mRNAs and proteins packaged into the egg by the mother
答案: 【developmentally active mRNAs and proteins packaged into the egg by the mother】
4、 问题:The positioning of the dorso-ventral axis in Xenopus is deter mined by ( ), while the positioning of the antero-posterior axis in chicks is deternined by ( ).
选项：
A:gravity; point of sperm entry
B:maternal factors in both cases
C:position in the egg chamber; gravity
D:the point of sperm entry; gravity
答案: 【the point of sperm entry; gravity】
第五章 胚胎来源和特化 第五章测试
1、 问题:If cells from the animal pole of a Xenopus blastula (animal cap cells) are placed in direct contact with cells from the vegetal region, what is the result?
选项：
A:An embryo forms with only ectodermal and endodermal derivatives.
B:Animal cap cells are induced by the vegetal cells to form meso dermal derivatives.
C:The embryo regulates and forms a normal embryo.
D:Vegetal hemisphere cells are induced by the animal cap cells to form mesodermal derivatives.
答案: 【Animal cap cells are induced by the vegetal cells to form meso dermal derivatives.】
2、 问题:Vg-1, Nodals, BMPs and activin are all members of which family of signaling molecules?
选项：
A:FGF
B:Hedgehog
C:TGF-β
D:Wnt
答案: 【TGF-β】
3、 问题:The Brachury protein is
选项：
A:an early marker of the mesoderm
B:an early marker of the endoderm
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