题目内容（请给出正确答案）

[单选题]

Maternal factors are（)

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

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更多“Maternal factors are()”相关的问题

第1题

The positioning of the dorso-ventral axis in Xenopus is deter mined by （), while the p

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

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第2题

母性影响(maternal effect) 名词解释

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第3题

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第4题

妇幼卫生服务评价（maternal and children's health service evaluation)

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第5题

母体影响（maternal effect) 名词解释

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第6题

Unlike in China, the kin terms used for relatives do not distinguish between ( ) relatives in Britain.

A.internal and external

B.old and young

C.maternal and paternal

D.male and female

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第7题

Endoderm and mesoderm are specified in the zebrafish blastoderm by（).

A.signals from the shield region

B.maternal signaling molecules laid down in the egg

C.a gradient of β-catenin signaling

D.a gradient of Nodal signaling

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第8题

My maternal grandfather was cut off at the age of 67.译：我的（)只活到67岁就去世了。

My maternal grandfather was cut off at the age of 67.

译：我的()只活到67岁就去世了。

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第9题

Each year, there is a certain theme concerning___________for World Health Day.

A.mental health

B.public health

C.health

D.maternal health

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第10题

快速将以下句子中的数字转换为中文： The maternal mortality rate has pummeted from 94.7 per 100, 000 in 1990 to 56.2 per 100, 000 in 1998.

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