A: Spermatogonia
B: Primary spermatocyte
C: Secondary spermatocyte
D: Spermatids
举一反三
- The least visible cell on the section of the seminiferous tubule in the testis section is A: spermatogonia B: primary spermatocyte C: sertoli cells D: secondary spermatocyte
- In<br/>testis, spermatogenic cells exclude() A: spermatogonium B: primary spermatocyte C: Supporting cells D: Secondary spermatocyte E: Spermatid
- How much DNA does a primary spermatocyte contain?? 4N|6N|IN|2N
- The cell in the testis that engulfs and digests the residual cytoplasm of sperm is A: spermatogonia B: interstitial cells C: Sertoli cells D: primary spermatocyts
- In exploring data for a research proposal, sources can be divided into ____________.primary A: primary source and secondary source B: first source and second source C: direct source and indirect source D: main source and minor source
内容
- 0
二次监视雷达解释正确的是 A: second surveillance radar B: secondary surveillance radar C: primary surveillance radar D: precision approach radar
- 1
The sequence of rape flower bud differentiation is A: A. Main stem, primary branch, secondary branch B: B, primary branch, secondary branch, main stem C: C. Secondary branching, primary branching, main stem D: D, simultaneous differentiation
- 2
A secondary market is a financial market in which new securities are traded, while a primary market is for trading second-handed securities.
- 3
The stock market main two sections are: A: Primary and secondary B: Real time and future time C: Primary and Real time D: Secondary and future time
- 4
Which of the following is a difference between primary and secondary capital markets（） A: Primary capital markets relate to the sale of new issues of bonds, preferred, and common stock, while secondary capital markets are where securities trade after their initial offering. B: Primary markets are where stocks trade while secondary- markets are where bonds trade. C: Both primary and secondary markets relate to where stocks and bonds trade after their initial offering.