Which of the following human cells is 1N and haploid? 1. a) Germinal epithelial cell 2. b) Primary spermatocyte 3. c) Spermatid 4. d) Type A1 Spermatogonium 5. e) Type B spermatogonium
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- Which of the following statements are false? A) An oocyte completes meiosis after a sperm penetrates it. B) The earliest stages of spermatogenesis occur closest to the lumen of the seminiferous tubules. C) Fertilization occurs in the oviduct. D) Effective hormonal contraceptives are currently available only for females. E) Spermatogenesis and oogenesis require different temperatures. F) Fragmentation is a type of asexual reproduction wherein an organism produces gemmules which are collections of many cells surrounded by a body wall. G) Lobsters and insects can reproduce via fragmentation.Spermatogenesis and oogenesis both involve meiosis but differ in significant ways. One of those differences include what? A) Cytokinesis is unequal in spermatogenesis B) Production of sperm is continuous; in humans, and the number of future egg cells is set at birth C) Oogenesis is an uninterrupted sequence, but there are long delays in spermatogenesis D) All of the aboveWhich of the following cell part is absent in a human spermatozoon? A) nucleus C) cell membrane B) cytoplasm
- Why is a second polar body expelled after fertilisation? a) To remove excess cytoplasm b) Because the oocyte must reactivate the incomplete meiosis before fusing with the sperm c) Before fusion with the sperm it must complete mitosis d) The fertilised oocyte is not a haploid cell until it expels the sperms mitochondriaMeiosis II of spermatogenesis yields a) Primary spermatocyces c) Spermatogonia d) Spežmatids 田 e) spermatozoaWhat may be the most likely reason for the existence of polar bodies? A) They act as a back-up in case the secondary oocyte becomes non-viable. B) They may be fertilized and produce a viable twin. C) They provide a structure for half of the chromosomes after cellular division. D) They add a hormonal stimulus necessary to trigger ovulation. E) They are important additional sources of estrogen.
- In vertebrate animals, spermatogenesis and oogenesis differ, in that 1.) Cytokinesis is unequal in oogenesis whereas it i equal in spermatogenesis 2.) spermatogenesis is not completed until after fertilization occurs, but oogenesis is completed by the time a girl is born 3.) Oogenesis produces four haploid cells, whereas spermatogenesis produces only one functional spermatozoon 4.) Oogensis ends at menopause. Whereas spermatogenesis is finished before birth 5.) Oogensis begins at the onset of sexual maturity whereas spermatogenesis happens in embryonic development6) Classify the following as either Sexual or Asexual Reproduction. Give the specific type of asexual reproduction. a) A small piece of a cactus breaks off the plant, falls to the ground, and begins to grow. b) Pollen from a male poplar tree fertilizes sex cells on a female poplar tree. c) Two earthworms each produce sperm and eggs and fertilize each other. d) A flatworm is cut in half and grows into two flatworms.5)What is the primary purpose of the fertilization membrane? a)Provide the growing embryo with food b)Serve as a barrier to protect the zygote from the environment c)Prevent multiple sperm from attempting to merge with an egg d)Hold the cells together when the zygote begins undergoing cell division e)None of these options is correct
- What stimulates the completion of meiosis Il in a secondary oocyte? O a) A surge of Follicle-Stimulating Hormone (FSH) following the degeneration of the corpus luteum O b) A surge of Luteinising Hormone (LH) on day 13 of the menstrual cycle O) Sperm-egg binding at fertilisation d) Sperm-zona pellucida binding at fertilisation1) Which statement below about asexual reproduction is FALSE? a) With asexual reproduction, offspring are genetically equivalent to the parent b) Asexual reproduction requires no partner c) Asexual reproduction requires meiosis d) Some organisms can reproduce both sexually and asexuallyWhich of the following statements are true? A) Fertilization typically occurs in the uterus. B) During the menstrual cycle typically two eggs are released during ovulation. C) None of the above choices are true.