PHYLOGENY OF VASCULAR PLANTS
... mass use of molecular characters in phylogenetic analysis. To some (e.g. 84), it may appear that molecular systematics has replaced cladistics, but in fact it simply applies cladistic methods to a new kind of data. The relative value of morphological and molecular data is a topic of debate. Clearly, ...
... mass use of molecular characters in phylogenetic analysis. To some (e.g. 84), it may appear that molecular systematics has replaced cladistics, but in fact it simply applies cladistic methods to a new kind of data. The relative value of morphological and molecular data is a topic of debate. Clearly, ...
Ch 30
... • Three key features of the gymnosperm life cycle are: – Dominance of the sporophyte generation ...
... • Three key features of the gymnosperm life cycle are: – Dominance of the sporophyte generation ...
22–3 Seedless Vascular Plants
... Seeds may have special tissues or structures that aid in their dispersal to other habitats. ...
... Seeds may have special tissues or structures that aid in their dispersal to other habitats. ...
(Zamiaceae) in a population with low seedlings density in
... and Dioon edule is therefore listed as an endangered species by the Mexican government [2] and as near threatened by IUCN [3]. These plants are important from an evolutionary standpoint because they belong to the group of gymnosperms [4], i.e., their reproductive structures are strobili or cones. Th ...
... and Dioon edule is therefore listed as an endangered species by the Mexican government [2] and as near threatened by IUCN [3]. These plants are important from an evolutionary standpoint because they belong to the group of gymnosperms [4], i.e., their reproductive structures are strobili or cones. Th ...
February 2017 (314kB pdf)
... 1. Where named plant examples are asked for, full botanical names (genus and species) are required to achieve full marks. Common names will not be given a mark. 2. Use the command statements e.g. list or name (single words only), state (a few sentences), describe or explain (a fuller answer) togethe ...
... 1. Where named plant examples are asked for, full botanical names (genus and species) are required to achieve full marks. Common names will not be given a mark. 2. Use the command statements e.g. list or name (single words only), state (a few sentences), describe or explain (a fuller answer) togethe ...
Plants with Seeds
... • Three key features of the gymnosperm life cycle are: – Dominance of the sporophyte generation ...
... • Three key features of the gymnosperm life cycle are: – Dominance of the sporophyte generation ...
Cotton seed production process
... First, whether the emasculation of the buds is perfect. Anther can not be left. The removed corolla and stamens should be taken out of the field and destroyed. ...
... First, whether the emasculation of the buds is perfect. Anther can not be left. The removed corolla and stamens should be taken out of the field and destroyed. ...
Systematic Implications of DNA variation in subfamily
... most would agree on a Triassic or Jurassic initial divergence, although there is no unequivocal fossil evidence A demonstrable “burst” of phylogenetic radiation is found in the fossil record beginning in the mid- to late Cretaceous, 140 - 100 mybp ...
... most would agree on a Triassic or Jurassic initial divergence, although there is no unequivocal fossil evidence A demonstrable “burst” of phylogenetic radiation is found in the fossil record beginning in the mid- to late Cretaceous, 140 - 100 mybp ...
Flower sexual behaviour - Formatted
... Development of the Male gametophyte The microspore is the first cell of the gametophytic generation. During gametogenesis, the nucleus of microspore divides mitotically to produce a bigger vegetative cell and a smaller generative cell (Fig. 6A,B). The generative cell is initially attached to the wal ...
... Development of the Male gametophyte The microspore is the first cell of the gametophytic generation. During gametogenesis, the nucleus of microspore divides mitotically to produce a bigger vegetative cell and a smaller generative cell (Fig. 6A,B). The generative cell is initially attached to the wal ...
EVERGREEN Ornamental Trees for Home Gardens and
... reactions to that flares allergic reactions; fruitless varieties available, some may pollen; basal still produce pollen. 'Bonita' (25' T, 25' W) less messy, tiny, suckers immature fruit. 'Majestic Beauty' (25-30' T, 25' W) long narrow, gray green leaves give it an airy appearance. 'Swan Hill' (25' T ...
... reactions to that flares allergic reactions; fruitless varieties available, some may pollen; basal still produce pollen. 'Bonita' (25' T, 25' W) less messy, tiny, suckers immature fruit. 'Majestic Beauty' (25-30' T, 25' W) long narrow, gray green leaves give it an airy appearance. 'Swan Hill' (25' T ...
Plants - brittany
... The Moss Life Cycle You recognize mosses as green, lowgrowing masses of plants. This is the gametophyte stage, which produces the sex cells. But the next time you see some moss growing, get down and look at it closely. If you see any brownish stalks growing up from the tip of the gametophyte plants ...
... The Moss Life Cycle You recognize mosses as green, lowgrowing masses of plants. This is the gametophyte stage, which produces the sex cells. But the next time you see some moss growing, get down and look at it closely. If you see any brownish stalks growing up from the tip of the gametophyte plants ...
Tree I.D.
... smooth margin with a conspicuous dark veins on the underside blocky looking bark ...
... smooth margin with a conspicuous dark veins on the underside blocky looking bark ...
The Anatomy of Arborescent Plant Life through Time
... Ferns in the order Marattiales range from the Carboniferous to recent times. This was the first modern group of ferns to evolve a structure that we think of as a real tree fern. The Carboniferous arborescent ferns possessed a kind of buttressed or braced trunk. Psaronius was the largest arborescent ...
... Ferns in the order Marattiales range from the Carboniferous to recent times. This was the first modern group of ferns to evolve a structure that we think of as a real tree fern. The Carboniferous arborescent ferns possessed a kind of buttressed or braced trunk. Psaronius was the largest arborescent ...
Double Haploid Technique: In Soybean and Other Species
... Haploid plantlets are formed in two distinct ways, by direct androgenesis or by organogenesis from haploid callus tissue. The anthers containing uninucleate pollen cultured on basal medium turn brownish within 2 weeks without any visible signs of growth. After 3-4 weeks in culture, small white protu ...
... Haploid plantlets are formed in two distinct ways, by direct androgenesis or by organogenesis from haploid callus tissue. The anthers containing uninucleate pollen cultured on basal medium turn brownish within 2 weeks without any visible signs of growth. After 3-4 weeks in culture, small white protu ...
S21:Reproduction in flowering plants
... two male gametes, which are inside the pollen grain, to within close proximity of the female gamete so that fertilisation can take place. When anthers are mature, they dry and split open (dehisce) down their lengths along two lines of weakness, thus releasing the pollen grains (Figure S21.6b). The m ...
... two male gametes, which are inside the pollen grain, to within close proximity of the female gamete so that fertilisation can take place. When anthers are mature, they dry and split open (dehisce) down their lengths along two lines of weakness, thus releasing the pollen grains (Figure S21.6b). The m ...
Thuja plicata - International Dendrology Society
... are densely borne and hang curtain like along the exposed branches, especially so under shaded conditions. Flattened branchlets display two kinds of leaves: facial leaves, which lie flat on the stem, and lateral leaves that are sharply folded around the stem. A third type of leaf occurs on the stu ...
... are densely borne and hang curtain like along the exposed branches, especially so under shaded conditions. Flattened branchlets display two kinds of leaves: facial leaves, which lie flat on the stem, and lateral leaves that are sharply folded around the stem. A third type of leaf occurs on the stu ...
Cycas
... and angiosperms. Gymnosperms flourished well during Mesozoic era. Hence the Mesozoic era is called the age of gymnosperms. However, most of the members of this group have now become extinct and only few living forms are known today. Some gymnosperms like Ginkgo biloba, Cycas, Metasequoia are called ...
... and angiosperms. Gymnosperms flourished well during Mesozoic era. Hence the Mesozoic era is called the age of gymnosperms. However, most of the members of this group have now become extinct and only few living forms are known today. Some gymnosperms like Ginkgo biloba, Cycas, Metasequoia are called ...
Chapter 10: Plant Reproduction
... The Moss Life Cycle You recognize mosses as green, lowgrowing masses of plants. This is the gametophyte stage, which produces the sex cells. But the next time you see some moss growing, get down and look at it closely. If you see any brownish stalks growing up from the tip of the gametophyte plants, ...
... The Moss Life Cycle You recognize mosses as green, lowgrowing masses of plants. This is the gametophyte stage, which produces the sex cells. But the next time you see some moss growing, get down and look at it closely. If you see any brownish stalks growing up from the tip of the gametophyte plants, ...
Chapter 4: Plant Reproduction
... The Moss Life Cycle You recognize mosses as green, lowgrowing masses of plants. This is the gametophyte stage, which produces the sex cells. But the next time you see some moss growing, get down and look at it closely. If you see any brownish stalks growing up from the tip of the gametophyte plants ...
... The Moss Life Cycle You recognize mosses as green, lowgrowing masses of plants. This is the gametophyte stage, which produces the sex cells. But the next time you see some moss growing, get down and look at it closely. If you see any brownish stalks growing up from the tip of the gametophyte plants ...
Chapter 38
... • Complete flowers contain all four floral organs • Incomplete flowers lack one or more floral organs, for example stamens or carpels • Clusters of flowers are called inflorescences ...
... • Complete flowers contain all four floral organs • Incomplete flowers lack one or more floral organs, for example stamens or carpels • Clusters of flowers are called inflorescences ...
UMass Dartmouth Tree Guide
... dogwood can be seen in May when the white bracts of the flower clusters develop. These look superficially like white petals but are actually 4 bracts (modified leaves) surrounding a cluster of 15-30 inconspicuous flowers. The bracts are 5-10 cm long and have a notch at their blunt tips. These bright ...
... dogwood can be seen in May when the white bracts of the flower clusters develop. These look superficially like white petals but are actually 4 bracts (modified leaves) surrounding a cluster of 15-30 inconspicuous flowers. The bracts are 5-10 cm long and have a notch at their blunt tips. These bright ...
Minnesota Tree Identification
... ooze or squirt fragrant resin when punctured. *Common conifer of northern MN. Also occurs in small pockets in SE MN. Most common conifer grown for Christmas trees. ...
... ooze or squirt fragrant resin when punctured. *Common conifer of northern MN. Also occurs in small pockets in SE MN. Most common conifer grown for Christmas trees. ...
Lyons Walking Arboretum
... and fragrant, in 6" long hanging clusters in late spring. Leaves are compound, 11" long, with 7 - 9 oval leaflets, each 1-1/2" long. Pods are 3" long, flattened and abundant, often persisting into winter. Twigs have 1/2" sharp, stiff thorns. These trees can be invasive. Hardy to zone 3, to 5500 ft. ...
... and fragrant, in 6" long hanging clusters in late spring. Leaves are compound, 11" long, with 7 - 9 oval leaflets, each 1-1/2" long. Pods are 3" long, flattened and abundant, often persisting into winter. Twigs have 1/2" sharp, stiff thorns. These trees can be invasive. Hardy to zone 3, to 5500 ft. ...
angiosperm life cycle - University of San Diego Home Pages
... • At one end of sac are the egg plus two synergid cells • At the other end are 3 antipodal cells • The large central cell has two polar nuclei ...
... • At one end of sac are the egg plus two synergid cells • At the other end are 3 antipodal cells • The large central cell has two polar nuclei ...
Common Allergenic Trees - Dermatology For Animals
... There is disagreement as to whether some forms should be varieties of this species or regarded as separate species. In any case, the “typical” form is distributed from southeastern Arizona eastward to western Texas; the smooth cypress of central Arizona, the Paiute and the Cuyamaca cypresses of Cali ...
... There is disagreement as to whether some forms should be varieties of this species or regarded as separate species. In any case, the “typical” form is distributed from southeastern Arizona eastward to western Texas; the smooth cypress of central Arizona, the Paiute and the Cuyamaca cypresses of Cali ...
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)"".