Question 20 In vertebrate animals, how are spermatogenesis and oogenesis differe

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Question 20 In vertebrate animals, how are spermatogenesis and oogenesis different? A. oogenesis begins at the onset of sexual maturity, whereas spermatogenesis happens in embryonic development. B. Oogenesis produccs four haploid cells, whereas spennatogenesis produces only one functional spermatozoon. C. Cytokinesis is unequal in oogenesis producing cells of different sizes, whereas it is equal in spermatogenesis. D. oogenesis ends at menopause, whereas spermatogenesis is fiaished before birth. Spenmatogenesis is not completed until after fertilization occurs, but oogenesis is completed by the time a girl is born. Question 2 How noany of the following cells are diploid? Oogontam Primary spermatocyte Secondary oocyte Question 22 The yolk of the frog egg A. prevents gastnalarion. B. is concentrated at the animal pole. C. is arranged in the egg. D. impedes formation of a primitive streak. E. supports the higher rate of cleav at the animal pole compared to the vegetal pole. age Question 23 Which environment is the most ideal for broadcast spawning? A. A saltwater marsh B. A freshwater stream C. A freshwater lake D. Dry terrestrial grassland E. Damp terrestrial undergrowth Question 24 Which of the following is a result of gastrulation? A. The formation of the blastopore, B. The movement of tissue into the middle layer of the embryo, C. The formation mesodermal of archenteron. the D. The movement of endodermal tissue into the inner layer of the embryo. E. All of the above. Question 25 Which of the following is a true tissue type you can find in an adult animal? A. Endoderm B. Mesoderm C. Ectoderm D. Pinacodemm E. Epithelium

Explanation / Answer

20. C

21. C

Spermatids and ovum are haploid

22. E

23. C

24. A

25. E

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