Biology: 4 multiple choice questions =]?

[TroubleM]

Item 1 refers to the following stages in the development of human sperm.I. SpermatidII. SpermatogoniumIII. Primary Spermatocyte1. Which of the following combinations is the correct order of sperm formation?A. I, II, IIIB. II, III, IC. II, I, IIID. I, III, II2. The function of the interstitial cells (cells of Leydig) is the production of:A. oestrogenB. progesteroneC. follicle stimulation hormoneD. testosterone3. The MAIN function of the placenta in humans is that it:A. protects the embryoB. separates foetal and maternal bloodC. allows exchange of materials between foetus and motherD. supports the embryo4. All of the following are able to cross the placenta except:A. E. coli bacteriumB. Human Immuno-Deficiency VirusC. carbon monoxideD. alcohol

[Raye]

1) B2) D3) B4) C

[spikegirl99992135]

Item 1 refers to the following stages in the development of human sperm.I. SpermatidII. SpermatogoniumIII. Primary Spermatocyte1. Which of the following combinations is the correct order of sperm formation?A. I, II, IIIB. II, III, I*C. II, I, IIID. I, III, II2. The function of the interstitial cells (cells of Leydig) is the production of:A. oestrogenB. progesteroneC. follicle stimulation hormoneD. testosterone*3. The MAIN function of the placenta in humans is that it:A. protects the embryoB. separates foetal and maternal bloodC. allows exchange of materials between foetus and mother*D. supports the embryo4. All of the following are able to cross the placenta except:A. E. coli bacterium*B. Human Immuno-Deficiency VirusC. carbon monoxideD. alcohol