Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 37m
3. Water1h 26m
4. Biomolecules2h 23m
5. Cell Components2h 26m
6. The Membrane2h 31m
7. Energy and Metabolism2h 0m
8. Respiration2h 40m
9. Photosynthesis2h 49m
10. Cell Signaling59m
11. Cell Division2h 47m
12. Meiosis2h 0m
13. Mendelian Genetics4h 44m
14. DNA Synthesis2h 27m
15. Gene Expression3h 6m
16. Regulation of Expression3h 31m
17. Viruses37m
- Viruses
  37m
18. Biotechnology2h 58m
19. Genomics17m
- Genomes
  17m
20. Development1h 5m
21. Evolution3h 1m
22. Evolution of Populations3h 53m
23. Speciation1h 37m
24. History of Life on Earth2h 6m
25. Phylogeny2h 31m
26. Prokaryotes4h 59m
27. Protists1h 12m
28. Plants1h 22m
29. Fungi36m
- Fungi
  19m
- Fungi Reproduction
  17m
30. Overview of Animals34m
- Overview of Animals
  34m
31. Invertebrates1h 2m
32. Vertebrates50m
33. Plant Anatomy1h 3m
34. Vascular Plant Transport1h 2m
- Water Potential
  1h 2m
35. Soil37m
- Soil and Nutrients
  20m
- Nitrogen Fixation
  16m
36. Plant Reproduction47m
- Flowers
  33m
- Seeds
  14m
37. Plant Sensation and Response1h 9m
38. Animal Form and Function1h 19m
39. Digestive System1h 10m
- Digestion
  1h 3m
- Blood Sugar Homeostasis
  7m
40. Circulatory System1h 49m
41. Immune System1h 12m
42. Osmoregulation and Excretion50m
- Osmoregulation and Excretion
  50m
43. Endocrine System1h 4m
- Endocrine System
  1h 4m
44. Animal Reproduction1h 2m
- Animal Reproduction
  1h 2m
45. Nervous System1h 55m
- Neurons and Action Potentials
  1h 8m
- Central and Peripheral Nervous System
  46m
46. Sensory Systems46m
- Sensory System
  46m
47. Muscle Systems23m
- Musculoskeletal System
  23m
48. Ecology3h 11m
49. Animal Behavior28m
- Animal Behavior
  28m
50. Population Ecology3h 41m
51. Community Ecology2h 46m
52. Ecosystems2h 36m
53. Conservation Biology24m
- Conservation Biology
  24m

28. Plants

Seed Plants

General Biology

28. Plants

Seed Plants

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1:19 minutes

Problem 3

Textbook Question

Angiosperms are different from all other plants because only they have
a. A vascular system.
b. Flowers.
c. Seeds.
d. A dominant sporophyte phase.

Verified step by step guidance

Understand the key characteristics of angiosperms: Angiosperms are flowering plants, and their defining feature is the presence of flowers, which are specialized structures for reproduction.

Review the characteristics of other plant groups: For example, gymnosperms also produce seeds but lack flowers, while non-vascular plants like mosses do not have a vascular system or seeds.

Analyze the options provided: Option (a) 'a vascular system' is not unique to angiosperms, as gymnosperms and ferns also have vascular systems. Option (c) 'seeds' is also not unique, as gymnosperms produce seeds as well. Option (d) 'a dominant sporophyte phase' is shared by angiosperms, gymnosperms, and ferns.

Focus on the unique feature of angiosperms: Flowers are exclusive to angiosperms and are used for sexual reproduction, often involving pollination by animals or wind.

Conclude that the correct answer is the feature that distinguishes angiosperms from all other plants, which is 'flowers' (option b).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Angiosperms

Angiosperms, or flowering plants, are a group of plants characterized by the presence of flowers and the production of seeds enclosed within a fruit. This group is distinct from gymnosperms, which produce seeds that are not enclosed. Angiosperms are the most diverse group of land plants and play a crucial role in ecosystems and human agriculture.

Flowers

Flowers are the reproductive structures of angiosperms, facilitating sexual reproduction. They contain male (stamens) and female (pistils) reproductive organs, allowing for pollination and fertilization. The presence of flowers is a defining feature of angiosperms, enabling them to attract pollinators and enhance genetic diversity through cross-pollination.

Vascular System

The vascular system in plants consists of xylem and phloem, which transport water, nutrients, and sugars throughout the plant. While both angiosperms and gymnosperms possess a vascular system, it is not unique to angiosperms. The vascular system is essential for supporting larger plant structures and facilitating efficient resource distribution.

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Related Practice

Textbook Question

Where in an angiosperm would you find a megasporangium?

a. In the style of a flower

b. Enclosed in the stigma of a flower

c. Within an ovule contained within an ovary of a flower

d. Packed into pollen sacs within the anthers found on a stamen

1237

views

Textbook Question

Which of the following is a key feature of seed plants facilitating life on land?

a. Homospory

b. Pollen

c. Reduced sporophytes

d. Spores

1109

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Textbook Question

Key features of seed plants facilitating life on land include three of the following four traits. Select the exception.

a. Homospory

b. Pollen

c. Reduced gametophytes

d. Seeds

1277

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Textbook Question

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

a. Egg—n

b. Megaspore—2n

c. Microspore—n

d. Zygote—2n

1239

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Textbook Question

Which of the following actions correctly describe a role performed by at least one type of intercellular connection? Select True or False for each statement.

T/FAllows communication between adjacent cells.

T/FForms a watertight barrier between the cells.

T/FUses components of the extracellular matrix to indirectly connect adjacent cells.

T/FAssociates with cytoskeletal components to resist pulling forces.

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Textbook Question

Which of the following is a characteristic that distinguishes gymnosperms and angiosperms from other plants?

a. Alternation of generations

b. Independent gametophytes

c. Vascular tissue

d. Ovules