Chapter 24: Gymnosperms
... progymnosperms, which possessed wood and heterospory, but reproduced by releasing spores. Currently, five lineages of seed plants survive--the flowering plants plus four groups of gymnosperms: cycads, Ginkgo, conifers, and gnetophytes. Conifers are the best known and most economically important grou ...
... progymnosperms, which possessed wood and heterospory, but reproduced by releasing spores. Currently, five lineages of seed plants survive--the flowering plants plus four groups of gymnosperms: cycads, Ginkgo, conifers, and gnetophytes. Conifers are the best known and most economically important grou ...
chapt30_lecture (1)
... -Primordium develops into a bud at the end of a stalk called the pedicel -Pedicel expands at the tip to form a receptacle, to which other parts attach -Flower parts are organized in circles called ...
... -Primordium develops into a bud at the end of a stalk called the pedicel -Pedicel expands at the tip to form a receptacle, to which other parts attach -Flower parts are organized in circles called ...
General Plant Life Cycle
... • Seed advantages – Don’t depend on water – Protects & nourishes embryo – Allow plants to grow in new locations ...
... • Seed advantages – Don’t depend on water – Protects & nourishes embryo – Allow plants to grow in new locations ...
Angiosperms - El Camino College
... Angiosperms have double fertilization and the development of a fruit • Double fertilization: Pollen tube discharges two sperm Into the female gametophyte Sperm + egg embryo (___n) Sperm + two nuclei endosperm(___n) ...
... Angiosperms have double fertilization and the development of a fruit • Double fertilization: Pollen tube discharges two sperm Into the female gametophyte Sperm + egg embryo (___n) Sperm + two nuclei endosperm(___n) ...
Lesson 1: What is Motion
... A seed that falls to the ground contains a small, young plant. Each seed needs water, oxygen, and the right temperature to germinate, or start to grow. o Food stored in the seed gives the young plant energy. Some plants grow from stems, roots, or leaves. o A bulb is a type of underground stem that s ...
... A seed that falls to the ground contains a small, young plant. Each seed needs water, oxygen, and the right temperature to germinate, or start to grow. o Food stored in the seed gives the young plant energy. Some plants grow from stems, roots, or leaves. o A bulb is a type of underground stem that s ...
Seeds and pollen are reproductive adaptations.
... The conifers, or cone-bearing trees, are the type of gymnosperm you are probably most familiar with. The conifers include pine, fir, spruce, hemlock, cypress, and redwood trees. Many conifers are adapted for living in cold climates, where there is relatively little water available. Their leaves are ...
... The conifers, or cone-bearing trees, are the type of gymnosperm you are probably most familiar with. The conifers include pine, fir, spruce, hemlock, cypress, and redwood trees. Many conifers are adapted for living in cold climates, where there is relatively little water available. Their leaves are ...
PLANT REPRODUCTION
... The sporophyte is the dominant generation, but multicellular male and female gametophytes are produced within the flowers of the sporophyte. Cells of the microsporangium within the anther undergo meiosis to produce microspores. Subsequent mitotic divisions are limited, but the end result is a multic ...
... The sporophyte is the dominant generation, but multicellular male and female gametophytes are produced within the flowers of the sporophyte. Cells of the microsporangium within the anther undergo meiosis to produce microspores. Subsequent mitotic divisions are limited, but the end result is a multic ...
Plants
... Microspores develop into pollen grains Megaspores develop into eggs (ovules) that will get fertilized within the ovary to become seeds. ...
... Microspores develop into pollen grains Megaspores develop into eggs (ovules) that will get fertilized within the ovary to become seeds. ...
Ch. 22
... The basic structure of a flower consists of four concentric circles, or whorls, connected to a base called a receptacle the sepals form the outermost whorl and typically protect the flower from physical damage the petals are the second whorl and serve to attract pollinators the third whorl is ...
... The basic structure of a flower consists of four concentric circles, or whorls, connected to a base called a receptacle the sepals form the outermost whorl and typically protect the flower from physical damage the petals are the second whorl and serve to attract pollinators the third whorl is ...
6A1-2 Vocabulary Cards
... fungi, and some microorganisms which is capable of development into a new individual either directly or after fusion with another spore; the fern plant spore has very little stored food resources compared with the actual seeds other plants produce ...
... fungi, and some microorganisms which is capable of development into a new individual either directly or after fusion with another spore; the fern plant spore has very little stored food resources compared with the actual seeds other plants produce ...
Section 3 * Vascular Plants
... • The Horsetails (Equisetum) • Grow from a rhizome • Stems are hollow and have joints with scale like leaves • Spores form in cones at the tip of the plant ...
... • The Horsetails (Equisetum) • Grow from a rhizome • Stems are hollow and have joints with scale like leaves • Spores form in cones at the tip of the plant ...
013368718X_CH24_377-392.indd
... A pistil is a structure that is made up of one or more carpels. ...
... A pistil is a structure that is made up of one or more carpels. ...
Nonvascular Plants: No water-conducting cells (xylem)
... The male cones first produce spores by meiosis, which develop into pollen grains and rest on the edges of the cone. These are carried by the wind, and some will reach the female cones in pollination. The pollen grains then directly enter the diploid sporangium in the ovule, and a female spore is pro ...
... The male cones first produce spores by meiosis, which develop into pollen grains and rest on the edges of the cone. These are carried by the wind, and some will reach the female cones in pollination. The pollen grains then directly enter the diploid sporangium in the ovule, and a female spore is pro ...
I. The first vascular plants evolve roughly 420 MYA as plants move
... III. Unifying traits that support all/most plant common ancestry. A. The “basic” structure – Root (below ground) and shoot (above ground). B. Apical meristematic tissue at the tips of roots and shoots. These tissues are areas of growth or elongation. C. Produce a waxy Cuticle on herbaceous parts. (“ ...
... III. Unifying traits that support all/most plant common ancestry. A. The “basic” structure – Root (below ground) and shoot (above ground). B. Apical meristematic tissue at the tips of roots and shoots. These tissues are areas of growth or elongation. C. Produce a waxy Cuticle on herbaceous parts. (“ ...
Plants - NIU Department of Biological Sciences
... and the scents that pollinators use to find the plants. Flowers secrete nectar which is eaten by the pollinators. The pollen is carried from flower to flower on the body of the pollinator, as a consequence of its going into the flower in search of nectar. Some angiosperms have winddispersed pollen. ...
... and the scents that pollinators use to find the plants. Flowers secrete nectar which is eaten by the pollinators. The pollen is carried from flower to flower on the body of the pollinator, as a consequence of its going into the flower in search of nectar. Some angiosperms have winddispersed pollen. ...
Reproduction in Flowering Plants
... Male or Female organs Male Gamete is sperm Female Gamete is egg produced in ovary Sperm nuclei fuses with egg nuclei (fertilization) Diploid zygote Zygote grows into embryo Embryo grows inside protective womb Placenta provides nourishment ...
... Male or Female organs Male Gamete is sperm Female Gamete is egg produced in ovary Sperm nuclei fuses with egg nuclei (fertilization) Diploid zygote Zygote grows into embryo Embryo grows inside protective womb Placenta provides nourishment ...
Gymnosperm fossils
... spermatophytes without ovary and fruit. Their seeds or ovules are naked or exposed, without a fruit wall. They are therefore considered as fruitless flowering plants and are referred to as “Phanerogams without ovary. Gymnosperm seeds develop either on the surface of scale- or leaflike appendages of ...
... spermatophytes without ovary and fruit. Their seeds or ovules are naked or exposed, without a fruit wall. They are therefore considered as fruitless flowering plants and are referred to as “Phanerogams without ovary. Gymnosperm seeds develop either on the surface of scale- or leaflike appendages of ...
Structural Botany Laboratory 10 Cordaitales and Coniferales
... world. Included in this group are such widely cultivated and familiar trees as pine, spruce, fir, cedar, yew, and redwood. Conifers are also an extremely ancient group of seed plants that can be traced back as far as the Carboniferous, where the closely related Cordaitales were also an important com ...
... world. Included in this group are such widely cultivated and familiar trees as pine, spruce, fir, cedar, yew, and redwood. Conifers are also an extremely ancient group of seed plants that can be traced back as far as the Carboniferous, where the closely related Cordaitales were also an important com ...
1 2006S Bio153 Lab 6: Gymnosperms and Angiosperms July 24th
... the ginkgo, the gnetophytes, the conifers and the angiosperms. Thus, seeds of seedferns and of true seed plants are another example of evolutionary convergence. The seed plants are a monophyletic group consisting of the gymnosperms (cycads, ginkgo, gnetophytes and conifers) and the angiosperms. Gymn ...
... the ginkgo, the gnetophytes, the conifers and the angiosperms. Thus, seeds of seedferns and of true seed plants are another example of evolutionary convergence. The seed plants are a monophyletic group consisting of the gymnosperms (cycads, ginkgo, gnetophytes and conifers) and the angiosperms. Gymn ...
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)"".