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What is the defining characteristic that distinguishes angiosperms from gymnosperms?
What is the defining characteristic that distinguishes angiosperms from gymnosperms?
- Formation of clade Angiospermae
- Presence of vessel elements in xylem
- Presence of flowers and fruits (correct)
- Enclosure of seeds within a fruit
Which term is derived from the Greek words for 'container, vessel' and 'seed'?
Which term is derived from the Greek words for 'container, vessel' and 'seed'?
- Magnoliophyta
- Angiosperm (correct)
- Xylem
- Forbs
What is the approximate number of known species of angiosperms?
What is the approximate number of known species of angiosperms?
- 100,000
- 500,000
- 50,000
- 300,000 (correct)
What is the composition of xylem in angiosperms?
What is the composition of xylem in angiosperms?
Which group of plants includes a vast majority of broad-leaved trees and shrubs?
Which group of plants includes a vast majority of broad-leaved trees and shrubs?
What is the clade commonly called angiosperms?
What is the clade commonly called angiosperms?
What is the approximate number of known genera of angiosperms?
What is the approximate number of known genera of angiosperms?
What type of plants were the ancestors of flowering plants distinguished from?
What type of plants were the ancestors of flowering plants distinguished from?
What is the meaning of the term 'angiosperm' derived from the Greek words ἀγγεῖον and σπέρμα?
What is the meaning of the term 'angiosperm' derived from the Greek words ἀγγεῖον and σπέρμα?
What distinguishes angiosperms from gymnosperms in terms of seed enclosure?
What distinguishes angiosperms from gymnosperms in terms of seed enclosure?
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Study Notes
Angiosperms vs. Gymnosperms
- Angiosperms are distinguished from gymnosperms by the presence of flowering structures and fruits that enclose seeds.
Etymology
- The term 'angiosperm' is derived from the Greek words ἀγγεῖον (container, vessel) and σπέρμα (seed), meaning 'seed in a container'.
Diversity
- There are approximately 400,000 known species of angiosperms.
- There are approximately 13,000 known genera of angiosperms.
Xylem Composition
- In angiosperms, xylem is composed of tracheids, vessels, and xylem parenchyma cells.
Classification
- Angiosperms are also known as the clade 'Anthophyta' or 'Magnoliophyta'.
- This group of plants includes a vast majority of broad-leaved trees and shrubs.
Evolution
- The ancestors of flowering plants were distinguished from other plants, specifically the gymnosperms.
Seed Enclosure
- Angiosperms are characterized by the enclosure of seeds in fruits, unlike gymnosperms, which have seeds exposed or naked.
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