Botany 25: Flowering Plants Finals
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Questions and Answers

What is the traditional name for flowering plants?

  • Gymnosperm
  • Angiosperm (correct)
  • Moss
  • Fungi

What structure in the ovary develops into a seed after fertilization?

Ovule

What does economic botany study?

Plants of economic importance

Which of the following are large classes of flowering plants? (Select all that apply)

<p>Monocots (A), Eudicots (B)</p> Signup and view all the answers

What develops into a fruit after fertilization?

<p>Ovary</p> Signup and view all the answers

What is a monocot?

<p>One of two main classes of flowering plants containing a single cotyledon</p> Signup and view all the answers

What is the seed leaf of a plant embryo called?

<p>Cotyledon</p> Signup and view all the answers

What is the nutritive tissue formed during the development of angiosperm seeds?

<p>Endosperm</p> Signup and view all the answers

What are eudicots?

<p>One of two main classes of flowering plants containing two cotyledons</p> Signup and view all the answers

What are synergids?

<p>Two cells closely associated with the egg</p> Signup and view all the answers

What is a pollen grain?

<p>Immature male gametophyte</p> Signup and view all the answers

What is double fertilization?

<p>A process in which there are two fertilizations, resulting in a zygote and endosperm</p> Signup and view all the answers

What is apomixis?

<p>A type of reproduction in which fruits and seeds are formed asexually</p> Signup and view all the answers

What does a paleobotanist study?

<p>Fossil plants</p> Signup and view all the answers

What is a basal angiosperm?

<p>One of three groups of angiosperms thought to be ancestral to all flowering plants</p> Signup and view all the answers

Core angiosperms are divided into three subgroups: magnoliids, monocots, and _____

<p>eudicots</p> Signup and view all the answers

What are magnoliids?

<p>Core angiosperms once classified as 'dicots'</p> Signup and view all the answers

What are catkins?

<p>Clusters of tiny flowers borne on a pendulous stalk</p> Signup and view all the answers

What is velamen?

<p>A layer of dead cells that absorbs and holds water</p> Signup and view all the answers

What are pseudobulbs?

<p>False bulbs that serve as a storage organ for food and water</p> Signup and view all the answers

Flashcards

Angiosperms

Flowering plants that reproduce sexually through flowers, forming seeds enclosed in fruits.

Monocots

A type of angiosperm with a single cotyledon (seed leaf) in their embryo.

Eudicots

A type of angiosperm with two cotyledons (seed leaves) in their embryo.

Ovule

The structure within the ovary of a flower that contains the female gametophyte, developing into a seed after fertilization.

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Ovary

The base of a carpel (or fused carpels) in a flower, containing ovules and maturing into a fruit after fertilization.

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Cotyledon

The first leaf(s) of an angiosperm embryo, often functioning as food storage for initial growth.

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Pollen grain

An immature male gametophyte in angiosperms, playing a crucial role in pollination and fertilization.

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Endosperm

A 3n nutritive tissue in angiosperm seeds, providing nourishment to the developing embryo.

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Double fertilization

Unique fertilization process in angiosperms involving two sperm cells: one fertilizes the egg to form a zygote, and the other fertilizes the central cell to form endosperm.

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Apomixis

Asexual reproduction in plants, leading to fruit and seed formation without fertilization.

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Core angiosperms

Major group of angiosperms, encompassing most species, divided into magnoliids, monocots, and eudicots.

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Basal angiosperms

Group of angiosperms thought to be ancestral to all flowering plants.

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Magnoliids

Core angiosperms previously classified as dicots, but molecular evidence distinguished them as separately evolved from monocots and eudicots.

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Synergids

Cells closely associated with the egg during fertilization in angiosperms.

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Paleobotanists

Scientists specializing in studying fossilized plants to understand plant evolution.

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Catkins

Clusters of small flowers on drooping stalks, a characteristic of certain angiosperm species.

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Velamen

Layer of dead cells in some plants, designed to absorb and retain water, aiding survival in specific conditions.

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Pseudobulbs

Thickened, false bulbs formed from rhizomes, serving as storage organs for food and water in certain plants.

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Study Notes

Key Concepts in Angiosperms

  • Angiosperms are flowering plants forming a diverse phylum known for sexual reproduction through flowers and seed production within enclosed fruits.
  • Monocots feature a single cotyledon, while eudicots have two cotyledons, representing the two major classes of flowering plants.

Reproductive Structures

  • Ovule contains the female gametophyte and develops into a seed upon fertilization.
  • Ovary is the base of a carpel or fused carpels where ovules are found and which matures into a fruit post-fertilization.
  • Cotyledon acts as the seed leaf in an embryo, often providing stored food for initial growth.
  • Pollen grain represents the immature male gametophyte involved in the fertilization process.

Developmental Processes

  • Endosperm, a 3n nutritive tissue, is crucial in angiosperm seed development.
  • Double fertilization involves two fertilizations: one forms a zygote, and the other produces endosperm, a unique feature of flowering plants.

Reproductive Variations

  • Apomixis refers to asexual reproduction in plants, resulting in fruit and seed formation without fertilization.

Specializations and Subcategories

  • Core angiosperms include most species of angiosperms, divided into three subgroups: magnoliids, monocots, and eudicots.
  • Basal angiosperms are recognized as ancestral to all flowering plant groups.
  • Magnoliids are core angiosperms previously categorized as dicots but identified through molecular evidence as non-eudicots and non-monocots.

Other Important Terms

  • Synergids are closely associated cells with the egg during fertilization.
  • Paleobotanists specialize in studying fossilized plants, contributing to our understanding of plant evolution.
  • Catkins are clusters of small flowers that appear on drooping stalks, a characteristic feature of certain plant species.
  • Velamen is a layer of dead cells designed to absorb and retain water, enhancing survival in specific environments.
  • Pseudobulbs are thickened, false bulbs forming from rhizomes, serving as storage organs for food and water.

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Prepare for your finals in Botany 25 with these essential flashcards on flowering plants. Learn key terms like angiosperms and ovules, and explore the field of economic botany. Perfect for consolidating your knowledge just before the exam!

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