In oogenesis, which of the following events occurs immediately following the completions of a meiosis II?
A、Sperm penetration of the corona radiata
B、Formation of a female pronucleus
C、Appearance of the blasrocyst
D、Completion of cleavage
A、Sperm penetration of the corona radiata
B、Formation of a female pronucleus
C、Appearance of the blasrocyst
D、Completion of cleavage
A、A round collar.
B、One straight piece covering the whole body.
C、Narrow sleeves.
D、Slits of two sides.
A、Using shocking statistics when necessary can make dramatic statements more effective.
B、Quotations used in introductory part should be as long as possible.
C、The props used in speech should support the objective of your speech.
D、By telling personal stories, speakers can easily involve their audience right from the start.
A、Identities are dynamic.
B、Identities are created through communication.
C、Identities are multi-complex.
D、Identities are fully formed at birth.
A、Epiblaslt
B、Syncytiotrophoblast
C、Hypoblast
D、Extraembryonic somatic mesoderm
A、Syncytiotrophoblast and cytotrophoblast
B、Syncyrtiotrophoblast and endometrium
C、Exocoelomic membrane and syncytiotrophoblast
D、Exocoelomic membrane and cytotrophoblast
A、diffusion
B、yolk sac nourishment
C、reverse osmosis
D、fetal capillaries
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