Biology 2

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HeidiBoehm
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176262
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Biology 2
Updated:
2012-10-14 22:16:43
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Biology Test Bio Two
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Biology Test over chapters 8-10, parts of 16 & 17
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  1. This process makes it possible for orgainisms to reproduce asexually.
    Mitosis
  2. ________ reproduction produces greater genetic variation that ________ reproduction.
    Sexual ; asexual
  3. Meiosis occurs where?
    In gametes (testes and ovaries)
  4. Normal human gametes carry _____ chromosomes.
    23
  5. Bacteria divide by:
    binary fission
  6. The first step of bacterial replication is _______ ____________. 
    DNA replication
  7. Replication of chromosomal DNA occurs 
    before a cell divides.
  8. Cell division consists of processes: 
    mitosis and cytokinesis
  9. Mitosis is divided into five phases:
    prophase, prometaphase, metaphase, anaphase, and telophase.
  10. When the cytoplasm splits to form two separate daughter cells this is called
    Cytokinesis 
  11. Nucleoli are present during
    interphase
  12. The majority of a cell's time is spent in what phase?
    Interphase
  13. A lump of abnormal cells that, although growing out of control, remains at its original site of growth.
    A benign tumor
  14. An abnormally growing mass of cells that is actively spreading throughout the body. 
    A malignant tumor
  15. The spread of cancer cells from their site of origin to other sites in the body.
    Metastasis
  16. An individual with a malignant tumor is said to have 
    cancer.
  17. What is the most common type of cancer?
    Carcinoma
  18. What process would be occuring in your hand right now?
    Mitosis- this goes on continuously in most parts of the body, whereas meiosis takes place only in the gonads.
  19. What is the point of attachment between two duplicated chromosomes?
    Centromere
  20. A sperm fertilizes an egg which produces a
    zygote.
  21. When chromosomes don't separate resulting in gamates having either too many or too few chromosomes
    Nondisjunction
  22. Turner syndrome individuals have only one x chromosome and are
    female.
  23. What is the creation of genetically identical offspring by a lone parent? 
    Asexual reproduction
  24. The creation of genticially unique offspring by two parents
    is sexual reproduction. 
  25. What do you call the fusion of two haploid sex cells (sperm and egg) to form a diploid cell?
    Fertilization
  26. What do you call the splitting off of new individuals from outgrowths of existing ones?
    Budding
  27. Reproductive systems with external fertilization are most common in 
    aquatic populations. 
  28. A sperm cell's acrosome function is what? 
    It contaions enzymes that are released when the sperm encounters an egg and dissolves a hole in the jelly-like matrix that surrounds the egg.
  29. When does the human embryo implant in the wall of the uterus? 
    About a week after conception.
  30. What are the mammalian group that lay eggs?
    Monotremes
  31. Angiosperms are ____________ ______________. 
    flowering plants
  32. Ovules develop into what?
    Seeds.
  33. Ovaries in plants develop into what?
    Fruit. 
  34. From the point of view of an angiosperm, what is the function of fruit?
    Mechanism for dispersal of seeds.
  35. This genetic disorder causes red blood cells to assume an unusual shape and produce abnormal hemoglobin proteins. 
    sickle-cell disease. 
  36. DNA consists of two complementary strands of _________ twisted together to form a ________ __________. 
    Nucleotides, double helix
  37. An adenine of one strand always pairs with a ________ of the complementary strand, and a guanine of one strand always pairs with a __________ of the complementary strand. 
    Thymine, cytosine
  38. Which is the largest unit of DNA organization?
    Genome
  39. How many polynucleotides are found in one molecule of DNA? 
  40. Which of the following make up the backbone of a polynucleotide strand? 
    sugar and phosphate
  41. How many polynucleotides are found in one molecule of DNA?
    two

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