Homework 24 pg 629 11 28 KEY - THCS

Ms. Culletto
Living Environment
April 20, 2011
Homework #24 pg. 629 11- 28
Part B:
11. The food-rich tissue that nourishes seedlings as they grow is known as
A. (1) Endosperm
12. A scientist wants to artificially pollinate a flower. In what part of a typical flower would he find the
pollen grains.
A. (3) Anther
13. The illustration below shows the germination of a pea plant. The feature labeled A is a(an)
A. (3) Cotyledon
14. Which part of a flower develops into a fruit?
A. (4) Ovary
15. Which flower structure below includes all of the others listed?
A. (4) Carpel/Pistil
16. All of the following are fruits except?
A. (3) Beets
17. State two ways pollen may be transferred from one plant to another
A. Wind, Animals
18. Some plants form flowers that produce stamens but no carpels. Could fruit form on one of these
flowers? Support your answer with an explanation.
A. No, the fruit is a swollen ovary which is the lower portion of the carpel. If no carpel is
present then a fruit can not form.
19. The seeds of lupines, an arctic plant, can remain dormant for thousands of years. Explain why this
trait is important to this plant in an arctic environment.
A. Dormancy allows for ideal conditions for the plant. In the arctic resources are often scarce.
By this plant being able to be dormant for a long period allows them to wait until they have
the right resources before germinating.
20. Which fruit was carried the farthest from the parent tree?
A. (1) Norway Maple
21. According to these data, what benefit does a winged fruit have over an acorn?
A. (C) It will travel farther.
22. The fruit of the oak and hickory is very different from the fruit of the maples and ash. Other than
dropping from the tree, what means of seed dispersal might the oak and hickory rely upon?
A. The oak may rely on animal dispersal to carry the seed away from the parent plant.
Animals like squirrels and other rodents eat acorns.
23. What does a plant need that makes it necessary for seed germination to start with the emergence of
a root rather than a shoot?
A. A germinating seed needs water, which is absorbed by the root in order to continue the
process of germination and coming out of the seed. The plant will not need a shoot or leaves
until it is above ground, because they are responsible for conducting photosynthesis. Before
the plant is above ground it continues to use the endosperm for food.
24. Inside which structure is pollen produced? What is the name of this structure?
A. (C) , The Anther
25. What structure is represented by A? What is its function?
A. A is the stigma, it is responsible for capturing the pollen.
26. In which structure do seeds develop?
A. F, The ovary
27. What are the names of structures G and H?
A. G is the sepal, and H is the petal
28. List two advantages of seed dormancy?
A. It allows for long- distance dispersal and allows seeds to germinate under ideal growth