![Angiosperms and course summary](http://s1.studyres.com/store/data/007775783_2-cdd7abe9692bd462893b125379211b33-300x300.png)
Angiosperms and course summary
... Free living gametophytes with multicelluar sex organs-antheridia and archegonia Free sporing plants (=shed their spores from the sporangia) ...
... Free living gametophytes with multicelluar sex organs-antheridia and archegonia Free sporing plants (=shed their spores from the sporangia) ...
Meiosis in Flowering Plants
... through the micropyle near the base of the ovule. The generative nucleus in the pollen grain divides by mitosis. The two nuclei move into the embryo sac where one fertilizes the polar nucleus to produce a triploid endosperm nucleus and the other fertilizes the egg nucleus to form a zygote. ...
... through the micropyle near the base of the ovule. The generative nucleus in the pollen grain divides by mitosis. The two nuclei move into the embryo sac where one fertilizes the polar nucleus to produce a triploid endosperm nucleus and the other fertilizes the egg nucleus to form a zygote. ...
az Gymnosperms.wpd
... “nuts” and are used in pesto. They are a western species and these seeds are many times larger than the seeds of red pine. Make a small cut in the seed coat with a razor blade, then using your finger nails peel off the seed coat. What tissue gave rise to the seed coat? _________________________ Imme ...
... “nuts” and are used in pesto. They are a western species and these seeds are many times larger than the seeds of red pine. Make a small cut in the seed coat with a razor blade, then using your finger nails peel off the seed coat. What tissue gave rise to the seed coat? _________________________ Imme ...
Plant Diversity II
... Characteristics of Conifers pines, firs, spruce, hemlock, cypresses Adapted to dry, cold conditions leaves are thin needles with thick cuticle retain leaves all year produce antifreeze resin in sap ...
... Characteristics of Conifers pines, firs, spruce, hemlock, cypresses Adapted to dry, cold conditions leaves are thin needles with thick cuticle retain leaves all year produce antifreeze resin in sap ...
Kingdom Plantae
... (Megaspore) goes through meiosis and then mitosis to yield 8 nuclei. 1 of these matures in the egg sac and becomes the egg cell - Pollen in the anter is formed when it’s mother cell divides by meiosis into 4 pollen grains. - When a pollen grain lands on the stigma, it’s cell divides by mitosis to fo ...
... (Megaspore) goes through meiosis and then mitosis to yield 8 nuclei. 1 of these matures in the egg sac and becomes the egg cell - Pollen in the anter is formed when it’s mother cell divides by meiosis into 4 pollen grains. - When a pollen grain lands on the stigma, it’s cell divides by mitosis to fo ...
Pinus wallichiana - World Agroforestry Centre
... younger twigs. Female cones in groups of 1-6, 20-30 cm long, erect when young but later pendant, bluish-green when young, maturing to light brown with pale brown apophyses. Cone scales wedge-shaped, wide near the apex, apophysis grooved, ending in a blunt umbo; basal scales usually not, or only slig ...
... younger twigs. Female cones in groups of 1-6, 20-30 cm long, erect when young but later pendant, bluish-green when young, maturing to light brown with pale brown apophyses. Cone scales wedge-shaped, wide near the apex, apophysis grooved, ending in a blunt umbo; basal scales usually not, or only slig ...
Plant Divisions
... from drying out Seed coat 2. Sperm transferred in water-proof pollen through pollination by wind or animals. 3. Developed seed-bearing structures: Cones & Flowers ...
... from drying out Seed coat 2. Sperm transferred in water-proof pollen through pollination by wind or animals. 3. Developed seed-bearing structures: Cones & Flowers ...
Chapter 32-Plant Reproduction
... • Fertilized by a SECOND sperm, forming the ENDOSPERM of a seed. (3) Embryo Sac (contains 7 cells and 8 nuclei) • Mature female gametophyte (megagametophyte) that becomes the ovule in the flowering ovary. (NOT found in gymnosperms) NOTE: In gymnosperms, ovules form on the scales of cones, NO embryo ...
... • Fertilized by a SECOND sperm, forming the ENDOSPERM of a seed. (3) Embryo Sac (contains 7 cells and 8 nuclei) • Mature female gametophyte (megagametophyte) that becomes the ovule in the flowering ovary. (NOT found in gymnosperms) NOTE: In gymnosperms, ovules form on the scales of cones, NO embryo ...
Gymnosperms
... -mostly without effective vegetative reproduction -only tracheids in the xylem (except for gnetophytes, which also have vessels) -naked seeds -relatively slow sexual reproduction -worldwide but dominant in many colder or arctic regions -include the tallest, the most massive, and the longest living i ...
... -mostly without effective vegetative reproduction -only tracheids in the xylem (except for gnetophytes, which also have vessels) -naked seeds -relatively slow sexual reproduction -worldwide but dominant in many colder or arctic regions -include the tallest, the most massive, and the longest living i ...
doc
... Meiosis produces spores and begins the haploid generation Megasporocytes (2n) are the cells within megasporangia that undergo meiosis to produce megaspores (n) Microsporocytes (2n) are the cells within microsporangia that undergo meiosis to produce microspores (n) Each megaspore develops into a fema ...
... Meiosis produces spores and begins the haploid generation Megasporocytes (2n) are the cells within megasporangia that undergo meiosis to produce megaspores (n) Microsporocytes (2n) are the cells within microsporangia that undergo meiosis to produce microspores (n) Each megaspore develops into a fema ...
Plant Kingdom - Excellup.com
... 3. Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them. Answer: Bryophytes, Pteridophytes and Gymnosperms bear distinct archegonia. In angiosperms the archegonia is reduced to just a few cells so the term is not used in case of angiosperms. Life Cycle ...
... 3. Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them. Answer: Bryophytes, Pteridophytes and Gymnosperms bear distinct archegonia. In angiosperms the archegonia is reduced to just a few cells so the term is not used in case of angiosperms. Life Cycle ...
Lecture Outline
... o Air-borne pollen grains get stuck in the sticky sap produced by the female cones, and when the pollen grain comes in contact with the female gametophyte (called an ovule), it produces a pollen tube that slowly grows into the ovule – to the egg o Sperm produced within the pollen tube fertilize the ...
... o Air-borne pollen grains get stuck in the sticky sap produced by the female cones, and when the pollen grain comes in contact with the female gametophyte (called an ovule), it produces a pollen tube that slowly grows into the ovule – to the egg o Sperm produced within the pollen tube fertilize the ...
Plants of Corsica - Bridget`s English pages.
... species, which grows in thickets on slopes and in gullies. It is the largest of the hellebores, which can in favorable conditions to 1.5 m or more. Compound of three toothed leaflets serrated, clear green leaves are all cauline. The pale green flowers of 3-5 cm in diameter, whose sepals sometimes fl ...
... species, which grows in thickets on slopes and in gullies. It is the largest of the hellebores, which can in favorable conditions to 1.5 m or more. Compound of three toothed leaflets serrated, clear green leaves are all cauline. The pale green flowers of 3-5 cm in diameter, whose sepals sometimes fl ...
plants
... Not many plants can live in the Taiga due to harsh weather. Some plant life that does survive there are coniferous trees such as, pine, spruce, hemlock, and fir trees. Forestry is the worst threat to the plants. Other things that threaten them are forest fires, insects, and pesticides. People use th ...
... Not many plants can live in the Taiga due to harsh weather. Some plant life that does survive there are coniferous trees such as, pine, spruce, hemlock, and fir trees. Forestry is the worst threat to the plants. Other things that threaten them are forest fires, insects, and pesticides. People use th ...
Plantae
... • Ovule in a ovulate cone – integument (seed coat) (2n) – megasporangia or nucellus (nutrition) (2n) – 4 _______________ from female gametophyte (3 die) • develops into female gametophyte – archegonium with eggs (n) ...
... • Ovule in a ovulate cone – integument (seed coat) (2n) – megasporangia or nucellus (nutrition) (2n) – 4 _______________ from female gametophyte (3 die) • develops into female gametophyte – archegonium with eggs (n) ...
Fulltext PDF
... the giants of the living world might disappear even as efforts are on to discover yet-to-be identified species. It was on one of the sunny winter afternoons in 1994, David Noble, an officer of National Parks and Wildlife Service, New South Wales found a rare species of plants that was a big tree and ...
... the giants of the living world might disappear even as efforts are on to discover yet-to-be identified species. It was on one of the sunny winter afternoons in 1994, David Noble, an officer of National Parks and Wildlife Service, New South Wales found a rare species of plants that was a big tree and ...
Overview of Plant Evolution
... In ferns the sporophyte generation is dominant and the gametophyte is reduced, but still visible to the naked eye. ...
... In ferns the sporophyte generation is dominant and the gametophyte is reduced, but still visible to the naked eye. ...
Chapter 24: Reproduction of Seed Plants
... • Seedless plants need water to carry their gametes from plant to plant. • Seed plants do not need water to transport their gametes. • Plants alternate between the sporophyte and gametophyte phases in their life cycle. ...
... • Seedless plants need water to carry their gametes from plant to plant. • Seed plants do not need water to transport their gametes. • Plants alternate between the sporophyte and gametophyte phases in their life cycle. ...
LE - 6 - Plant Reproduction
... B. The pollen tube grows from the pollen grain down through the style and into the ovary at the ovule. ...
... B. The pollen tube grows from the pollen grain down through the style and into the ovary at the ovule. ...
Pinophyta
The conifers, division Pinophyta, also known as division Coniferophyta or Coniferae, are one of 12 extant division-level taxa within the Kingdom Plantae (Viridiplantae) and 10 within the extant land plants. Pinophytes are gymnosperms, cone-bearing seed plants with vascular tissue. All extant conifers are woody plants with secondary growth, the great majority being trees with just a few being shrubs. Typical examples of conifers include cedars, Douglas-firs, cypresses, firs, junipers, kauri, larches, pines, hemlocks, redwoods, spruces, and yews. The division contains approximately eight families, 68 genera, and 630 living species.Although the total number of species is relatively small, conifers are of immense ecological importance. They are the dominant plants over huge areas of land, most notably the boreal forests of the northern hemisphere, but also in similar cool climates in mountains further south. Boreal conifers have many wintertime adaptations. The narrow conical shape of northern conifers, and their downward-drooping limbs, help them shed snow. Many of them seasonally alter their biochemistry to make them more resistant to freezing, called ""hardening"". While tropical rainforests have more biodiversity and turnover, the immense conifer forests of the world represent the largest terrestrial carbon sink, i.e. where carbon from atmospheric CO2 is bound as organic compounds.They are also of great economic value, primarily for timber and paper production; the wood of conifers is known as softwood.Conifer is a Latin word, a compound of conus (cone) and ferre (to bear), meaning ""the one that bears (a) cone(s)"".