Fichas
Angiosperms: Introduction
Fichas del conjunto (57)
- 1What are angiosperms distinguished by?Flowers
Fruits
Extreme reduction of gametophyte generation. - 2What are the two classes of angiophyta?Liliopsida
Magnoliopsida - 3What are the differences between monocotyledons and dicotyledons)Monocots:
1 cotyledon in embryo
parallel nervation of leaves
Scattered vascular Bundles
No true secondary growth
Flowers have 3 petals
Pollen has 1 hole (monoaperturate)
Dicots:
2 cotyledons
Leaf has net-like innervation
Vascular bundles in a ring
Secondary growth from cambrium
4-5 leaves on flowers
Pollen has 3 holes (traperturate) - 4What is a flower?Determinate shoot with growth of limited duration
- 5What are carpels?Megasporophylls
Collection of female parts of the flower - 6What are stamens?Microsporophylls
Collection of male parts of a flower - 7What is an inflorescence?Cluster of flowers dispersed in a definite pattern
- 8What are sporophylls?Modified leaves that bear sporangia.
- 9What are carpels?Megasporophylls that contain ovules that develop into seeds.
- 10What are stamens?Microsporophylls that develop into pollen grains.
- 11How many whorls does a flower have?4
- 12What is the perianth?2 whorls of sterile parts in a flower composed of the calyx and corolla.
- 13What is the calyx?the Sepals
- 14What is the corolla?petals
- 15What are tepals?When petals and sepals are similar in shape and colour.
- 16What is the androecium?Stamens
- 17What is the gynoecium?Carpals
- 18What is a pistil?Fused carpals
- 19Label this diagram
- 20Label this diagram
- 21What is an anther?4 sporangia on a filament
- 22Label this diagram
- 23Label this diagram
- 24Label this diagram
- 25What type of placentation is this?Parietal
- 26What type of placentation is this?Axile
- 27What type of placentation is this?Free central
- 28What type of placentation is this?Apical
- 29What type of placentation is this?Basal
- 30What is a perfect flower?Flower with both androecium and gynacoecium
- 31What is a staminate flower?Male flower
- 32What is a carpellate flower?Female flowers
- 33What is a monoeciuos plant?Has unisexual flowers but both sexes are on the same individuals
- 34What is a dioecious plant?Have unisexual flowers on individual plants
- 35What is a complete flower?Has all 4 whorls (Corolla, Calyx, Androecium, Gynoecium)
- 36What is an incomplete flower?One or more whorls are absent
- 37What is a connate flower?Flower with parts fused together
- 38What is adnation?Whorls fused together
- 39What is an actinomorphic flower?Flower with radial symmetry
- 40What is a zigomorphic flower?Flower with bilateral symmetry
- 41What is a hypogynous flower?Flower below the ovary
- 42What is a perigynous flower?Flower surrounds ovary
- 43What is an epigynous flower?Flower is over ovary
- 44What is the exine pollen grain wall?The resistant outer wall composed to sporopollenin
- 45What is the intine pollen grain wall?The inner wall composed of cellulose and pectin
- 46What two cells make up the immature microgametophyte?The tube cell and the generative cell
- 47What is microsporogenesis?Production of 1-celled microspores within microsporangia
- 48What is microgametogenesis?Production of microgametophyte within microspore
- 49What is an ovule?Microsporangium containing a single megaspore surrounded by an integument
- 50How many divisions does it take to make an embryo sac from the megaspore?3
- 51Label this diagram
- 52Label this diagram
- 53What are the steps of pollination?1. Pollen is captured on stigma and hydrated
2. Pollen germinates, pollen tube grows within style
3. Tube reaches ovule, enters through micropyle and reaches synergid cell - 54What are the steps of double fertilization?1. Pollen tube penetrates synergid
2. First sperm nucleus fertilises the egg and creates zygote (2n)
3. Second sperm nucleus fertilises the central cell with 2 polar nuclei (this triple fusion makes primary endosperm) - 55What does the triploid central cell turn into?Endosperm, which provides food storage.
- 56WSeed
- 57What does the mature ovary become after fertilization?Fruit
Información
- Descripción
- Angiosperm: introduction flash cards
- Creado por
- Usuario eliminado · dic 2016
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- 10 dic 2016
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- Creado por Shareef Akbari · 8 dic 2016
- Copiado por Shareef Akbari · 9 dic 2016
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