Question

1. When you look at a pine or maple tree, the plant you see is 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.

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) _____.

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?

a. It develops from the fusion of a microspore and a 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?

a. Pollen grains contain female gametophytes.

b. A pollen tube slowly digests its way through the triploid 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?

a. sporophyte embryo b. female gametophyte c. egg cell d. 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).

a. sporophyte b. microspores c. microsporangia d. pollen cone e. pollen nuclei

12. Which trait(s) is (are) shared by many modern gymnosperms and angiosperms?

a. pollen transported by wind b. lignified xylem c. microscopic gametophytes

d. sterile sporophylls, modified to attract pollinators e. endosperm

13. Which structure is common to both gymnosperms and angiosperms?

a. Anthers b. ovule c. stigma d. ovary e. carpel

14. What stamens, sepals, petals, carpels, and pinecone scales 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

d. a dominant sporophyte generation e. haploid gametophytes

18. The male gametophytes of flowering plants are also referred to as _____.

19. In flowering plants the integuments of the ovule develop 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.

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?

24. Angiosperm double fertilization is so-called because it 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?

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___________

28. Human survival literally depends on the produce of _____.

29. Where in an angiosperm would you find a megasporangium?

30. With respect to angiosperms, which of the following is incorrectly paired with its chromosome count?

31. With respect to angiosperms, which of the following is incorrectly paired with its chromosome count?

a. microspore-n, b. zygote-2n, c. egg-n, d. sperm-n, e. megaspore-2n,

Answer 1

When you look at a pine or maple tree, the plant you see is a _____.

The answer is The plant is SPOROPHYTE. It belongs to Gymnosperms, in gymnosperms the sporophyte plant which is diploid in conditions occupaies a major portion in life cycle. The gemetophytes are minute in size.