1. When you look at a pine or maple tree, the plant you see is a…
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Question “1. When you look at a pine or maple tree, the plant you see is a…”
1. When you look at a pine or maple tree, the plant you see is
a _____.
a _____.
2. The Brazil nut tree, Bertholletia excels (n = 17), is
native to tropical rain forests of South America. It is a hardwood
tree that can grow to over 50 meters tall, is a source of
high-quality lumber, and is a favorite nesting site for harpy
eagles. As the rainy season ends, tough-walled fruits, each
containing 8-25 seeds (Brazil nuts), fall to the forest floor.
Brazil nuts are composed primarily of endosperm. About $50 million
worth of nuts are harvested each year. Scientists have discovered
that the pale yellow flowers of Brazil nut trees cannot fertilize
themselves and admit only female orchid bees as pollinators. The
agouti (Dasyprocta spp.), a cat-sized rodent, is the only animal
with teeth strong enough to crack the hard wall of Brazil nut
fruits. It typically eats some of the seeds, buries others, and
leaves still others inside the fruit, which moisture can now enter.
The uneaten seeds may subsequently germinate.
native to tropical rain forests of South America. It is a hardwood
tree that can grow to over 50 meters tall, is a source of
high-quality lumber, and is a favorite nesting site for harpy
eagles. As the rainy season ends, tough-walled fruits, each
containing 8-25 seeds (Brazil nuts), fall to the forest floor.
Brazil nuts are composed primarily of endosperm. About $50 million
worth of nuts are harvested each year. Scientists have discovered
that the pale yellow flowers of Brazil nut trees cannot fertilize
themselves and admit only female orchid bees as pollinators. The
agouti (Dasyprocta spp.), a cat-sized rodent, is the only animal
with teeth strong enough to crack the hard wall of Brazil nut
fruits. It typically eats some of the seeds, buries others, and
leaves still others inside the fruit, which moisture can now enter.
The uneaten seeds may subsequently germinate.
a. 17 b. 51 c. 34 d. 68 e. impossible to tell
3. Which of these is a male gametophyte?
4. In pines, the female gametophyte contains _____, each of
which contains a(n) _____.
which contains a(n) _____.
5. In pines, an embryo is a(n) _____.
6. In pine trees, pollen grains get to the ovule via the
_____.
_____.
7. Which of these statements is true about the gametophyte
tissue that surrounds the pine embryo?
tissue that surrounds the pine embryo?
a. It develops from the fusion of a microspore and a
megaspore.
megaspore.
b. It functions as a triploid food reserve.
c. It functions as a diploid food reserve.
d. It functions as a haploid food reserve.
e. It is the remnant of the pollen tube.
8. In the pine, microsporangia form _____ microspores by
_____.
_____.
9. Which of the following statements correctly describes a
portion of the pine life cycle?
portion of the pine life cycle?
a. Pollen grains contain female gametophytes.
b. A pollen tube slowly digests its way through the triploid
endosperm.
endosperm.
c. Female gametophytes use mitosis to produce eggs.
d. Seeds are produced in pollen-producing cones
10. Within a gymnosperm megasporangium, what is the correct
sequence in which the following should appear during development,
assuming that fertilization occurs?
sequence in which the following should appear during development,
assuming that fertilization occurs?
a. sporophyte embryo b. female gametophyte c. egg cell d.
megaspore
megaspore
11. Arrange the following structures, which can be found on
male pine trees, from the largest structure to the smallest
structure (or from most inclusive to least inclusive).
male pine trees, from the largest structure to the smallest
structure (or from most inclusive to least inclusive).
a. sporophyte b. microspores c. microsporangia d. pollen cone
e. pollen nuclei
e. pollen nuclei
12. Which trait(s) is (are) shared by many modern gymnosperms
and angiosperms?
and angiosperms?
a. pollen transported by wind b. lignified xylem c.
microscopic gametophytes
microscopic gametophytes
d. sterile sporophylls, modified to attract pollinators e.
endosperm
endosperm
13. Which structure is common to both gymnosperms and
angiosperms?
angiosperms?
a. Anthers b. ovule c. stigma d. ovary e. carpel
14. What stamens, sepals, petals, carpels, and pinecone scales
have in common?
have in common?
15. Ovules are found within structure _____.
16. “A” represents ______.
17. Which of these is unique to flowering plants?
a. an embryo surrounded by nutritive tissue b. pollen
production c. double fertilization
production c. double fertilization
d. a dominant sporophyte generation e. haploid
gametophytes
gametophytes
18. The male gametophytes of flowering plants are also
referred to as _____.
referred to as _____.
19. In flowering plants the integuments of the ovule develop
into a(n) _____.
into a(n) _____.
20. A carpel is composed of _____.
21. A stamen consists of _____.
22. In angiosperms, pollination is the transfer of pollen
grain to the _____ of a flower on the same plant or another
plant.
grain to the _____ of a flower on the same plant or another
plant.
23. Unlike most angiosperms, grasses are pollinated by wind.
As a consequence, some unnecessary parts of grass flowers have
almost disappeared. Which parts would you expect to be most reduced
in a grass flower?
As a consequence, some unnecessary parts of grass flowers have
almost disappeared. Which parts would you expect to be most reduced
in a grass flower?
24. Angiosperm double fertilization is so-called because it
features the formation of
features the formation of
25. How fruits aid angiosperm survival?
26. Which part of a flower developes into the seed? Which one
developes into the fruit?
developes into the fruit?
27. Many mammals have skins and mucous membranes that are
sensitive to phenolic secretions of plants like poison oak (Rhus).
These secondary compounds are primarily adaptations
that___________
sensitive to phenolic secretions of plants like poison oak (Rhus).
These secondary compounds are primarily adaptations
that___________
28. Human survival literally depends on the produce of
_____.
_____.
29. Where in an angiosperm would you find a
megasporangium?
megasporangium?
30. With respect to angiosperms, which of the following is
incorrectly paired with its chromosome count?
incorrectly paired with its chromosome count?
31. With respect to angiosperms, which of the following is
incorrectly paired with its chromosome count?
incorrectly paired with its chromosome count?
a. microspore-n, b. zygote-2n, c. egg-n, d. sperm-n, e.
megaspore-2n,
megaspore-2n,
Answer
If you look at a maple or pine tree, you will see a _____.
Answer: The plant is SPOROPHYTE. Gemetophytes are small in size.
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