Science 9
Life Science: Reproduction Questions
Note: these questions provide a good review of this section but they do not ask about every topic. Your
notes and diagrams are your main resource. Answer all parts of each question.
A Common Thread
1. Read the following statements made by your friends. How would you address their concerns?
a) "My hair has too much highlight in it. It will never look right again!"
b) "I jammed my finger in a door and the fingernail is wrecked."
c) "I just got this paper cut; it's really bleeding."
d) "Will this bruise on my cheek ever go away?"
e) "I will never fit into this expensive top. I never should have bought it on sale."
f) "I think this scrape is really infected."
Cell Theory
2. a) Cell theory has finally been accepted for only the past 60 years. T, F, explain.
b) Cell Theory is an obvious idea. T, F, explain.
3. Read the following beliefs from years past. Do they agree with Cell Theory?
a) You can make a mouse by leaving a pile of rags and some bits of bread in a dark corner for a week.
b) Really tiny bugs are too small to have cells.
c) An earthworm does not need all of its cells to function in a regular way.
d) Small, very simple organisms like bacteria can get by without having cells.
e) At some point in its growth phase, a plant's behavior does not rely on its cells.
f) Structures even smaller than cells are the basic units of a plant's structure and function.
4. a) A cell behaves like what type of manufacturing building invented during the Industrial Revolution?
b) In the most basic terms, how does a factory operate?
5. a) There are how many basic types of cells? b) What are their basic shapes?
6. What is a practical difficulty with understanding the operation of cells?
7. We contain approximately how many cells?
Animal Cell Organelles
8. Name the organelle that:
a) covers the cell b) provides energy for the cell c) covers the nucleus
d) is in the form of long strands made of DNA e) is like a maze of canals
f) creates packages to be sent to out of the cell g) is like jelly and holds all the other organelles.
Plant Cell Organelles
9. Name the organelle that:
a) forms a rigid wall around the cell
b) contains chemicals that help the plant make food using sunlight
c) is much larger in plant cells than in animal cells.
10. Which organelles are found only in plant cells?
Who's In Charge?
11.What part of the cell is in charge of its many operations?
12. What chemical contains the genetic codes containing the cell's instructions?
The Cell Cycle
13. Why is a piece of spaghetti not like a cell as it gets smaller and smaller as we cut it in half repeatedly?
14. Cell division occurs through what process?
15. This process has how many steps?
16. What does a chromatin strand resemble?
17. What is at its center?
18. Cell division ensures that a parent cell divides to form two daughter cells that are very different from
each other. T, F, explain.
19. We have how many chromosomes?
20. Name the phase of mitosis in which:
a) chromatin strands become dark and visible
b) double strand chromosomes line up along the cell's equator
c) double strand chromosomes are pulled apart
d) each end of the cell gets a set of single strand chromosomes
e) the cell pinches in half to form two daughter cells.
21. The time spent by the cell acting like a factory is called what?
I Am Cell Division!
22. Why is cell division so important to your growth and development?
23. All cells have similar lifespans. T, F, explain.
24. Define: regeneration.
25. We can regenerate limbs. T, F, explain.
26. What causes aging?
27. How might growth hormones affect this process?
28. When does cancer occur?
29. What is a tumor?
Asexual Reproduction
30. Define: asexual reproduction.
31. This type of reproduction requires how many parents?
32. There are how many modes or types of asexual reproduction?
33. Name the type of asexual reproduction used by the following organisms:
a) bacteria b) amoeba c) fungi d) yeasts e) moulds
34. What is a cutting?
35. How is it used to propagate plants?
36. How do you make a graft?
37. What are advantages of grafts?
38. How do strawberry plants multiply?
39. Why is digging up dandelions a useless way of trying to eliminate this plant?
40. What is a safe, effective way?
41. How does tissue culture work?
Sexual Reproduction
42. Define: sexual reproduction.
43. Describe variation among siblings in terms of their DNA.
44. Name the male and female gametes.
45. Where is each type of sex cell created?
46. What cells unite to form a zygote?
47. What process occurs repeatedly to turn a zygote into an adult?
48. A sex cell contains a full set of DNA instructions. T, F, explain.
49. A zygote contains a full set of DNA instructions. T, F explain.
50. What process creates sex cells?
51. It has how many major phases?
52. What is the key to its operation?
Animal Fertilization Patterns
53. Nature allows organisms to mate and produce offspring any time of the year. T, F, Explain.
54. a) What is an important requirement for fertilization? b) Why?
55. a) How does fertilization occur with corals and fish? b) What about with frogs?
56. a) Land dwellers use what type of fertilization? b) Why?
57. Where do the embryos of the following animals develop?
a) mammals b) reptiles and birds c) marsupials
Plant Fertilization Patterns
58. Define: angiosperm.
59. Name the male and female reproductive stricture of flowers.
60. Name the gametes they produce.
61. Contrast cross- and self-pollination.
62. What agents transport pollen grains?
63. What is the intended target of a pollen grain?
64. A fertilized ovule becomes what?
65. How do flowers protect the fertilized ovules?
66. What agents transfer seed pods?
67. Define: gymnosperm.
68. Describe how pollination occurs for them.
69. How are their seeds spread?
70. What types of plants use spores to create new plants?
71. a) These types of plants live in what type of environment? b) Why?
Variation
72. Explain why variation is so important.
73. Would a large forest with all the same type of tree be a healthy situation?