BioScience Dictionary

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Found Flowering plants 13 times.

Displaying results 1 to 10.

1. Adaptive radiation
The development of a variety of species from a single ancestral form; occurs when a new habitat becomes available to a population . Evolutionary pattern of divergence of a great many taxa from a common ancestral species as a result of novel adaptations or a recent mass extinction . Examples: mammals during the Cenozoic Era after the extinction of dinosaurs at the close of the Mesozoic Era flowering plants during the Cretaceous Period diversified because of their reproductive advantages over gymnosperm and non-seed plants that dominated the floras of the world at that time.

2. Angiospermae
A major division of the plant kingdom, commonly called flowering plants as their reproductive organs are in flowers, having seeds which develop in a closed ovary made of carpel s, a very reduced gametophyte , and endosperm develop from a triple fusion nucleus.

3. Angiosperms
Flowering plants. first appearing at least 110 million years ago from an unknown gymnosperm ancestor, flowering plants have risen to dominance in most of the world's floras. The male gametophyte is 2-3 cells contained within a pollen grain; the female gametophyte is usually eight cells contained within an ovule which is retained on the sporophyte phase of the plant's life cycle.

4. Cotyledon
A leaf-like structure that is present in the seeds of flowering plants ; appears during seed germination and sometimes is referred to as a seed leaf.

5. Dicots
One of the two main types of flowering plants ; characterized by having two cotyledons , floral organs arranged in cycles of four or five, and leaves with reticulate veins; include trees (except conifers) and most ornamental and crop plants.

6. Gnetales
Group of seed plants restricted to three genera today (Gnetum, Ephedra, and Welwitschia); the possible outgroup for flowering plants.

7. Kaemferol
A flavone-ring-containing plant pigment found in many angiosperms (flowering plants).

8. Microsporangia
Structures of the sporophyte in which microspores are produced by meiosis . In flowering plants the microsporangia are known as anther sacs .

9. Microspore mother cell
Cells in the microsporangium that undergo meiosis to produce microspores. In flowering plants the microspore is known as the pollen grain , and contains a three-celled male.

10. Monocots
One of the two major types of flowering plants; characterized by having a single cotyledon , floral organs arranged in threesd or multiples of three, and parallel-veined leaves; include grasses, cattails, lilies, and palm trees. One of the two major groups in the Angiosperms , monocots are characterized by having a single seed leaf (cotyledon), flower parts in 3's or multiples of 3, monoaperturate pollen (although some dicots also have this feature), parallel veins in their leaves, and scattered vascular bundles in their stems.