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polar axis

Listing 1 - 8 from 8 for polar axis

Glossary of Pollen and Spore Terminology - Part 2 (D-H)
... a pollen grain is seen in polar view. Synonym of limb. See also: amb. Equatorial plane (Fgri and Iversen, 1950) The plane perpendicular to the polar axis and lying midway between the ... where the equatorial plane is directed towards the observer. Antonym: polar view. Equiaxe (adj.equiaxal) (Van Campo, 1966) Pollen grains with a polar axis equal to the equatorial diameter. See also: breviaxe, ...
www.biol.ruu.nl

Glossary of Pollen and Spore Terminology - Part 5 (S-Z)
... classes (pl.) (Erdtman, 1943) Categories of pollen and spore shape based on the relations between polar axis (P) and equatorial diameter (E). See also: oblate, oblate spheroidal, P/E ratio, peroblate, ... Spheroidal (Erdtman, 1943) Describing the shape of a pollen grain or spore in which the polar axis and the equatorial diameter are approximately equal. Comment: This term belongs to the system ...
www.biol.ruu.nl
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FLORA OF NORTH AMERICA - Volume 1, Chapter 1
... , not penetrating beyond the Appalachians or Cape Hatteras. Air masses converge along fronts. The Polar Front is the fundamental climatic phenomenon at midlatitudes,where temperature contrasts are sharpest. It ... . Lawrence Lowland Province follows the course of the St. Lawrence River from the Frontenac Axis (a narrow outcrop of Precambrian rock linking the Canadian Shield to the Adirondacks, just ...
hua.huh.harvard.edu

glossary E
... of polar nuclei and sperm nucleus. Entire A continuous margin without teeth or lobes. Epiblast A small, nonvasculated flap or flange of tissue on the side of the grass embryo axis opposite ...
www.csdl.tamu.edu

Untitled
... share of what will be discussed with the students. Stem. A stem is the growing axis of a plant. Unlike animals, which seem to grow all over, plants grow only from ... base of a tall mountain to its top as compared to heading toward the nearest polar region from the base of the same mountain. Alexander von Humbolt, explorer and biogeographer of ...
www.huntington.org

Centre for Plant Sciences
... , auxin is unique among plant hormones in that its transport is both tightly regulated and polar, allowing auxin to carry directional intercellular and longer distance signals, and thus to act as ... ethylene signaling. Cell 115, 647-648 Kepinski, S. and Leyser, O. (2003) Plant Development: An Axis of Auxin. Nature 426, 132-135 Gray, W.M†., Kepinski, S.†., Rouse, D., Leyser ...
www.plants.leeds.ac.uk

Lab VII - The Origin of Seed Plants (1)
... have been proposed but not generally accepted. Psilophyton is characterized by a main axis that branches pseudomonopodially rather than dichotomously (Figure 7.2), although branching is ... black and metaxylem drawn as individual cells. Note differentiated epidermis. (C) Elongated sporangia (polar and equatorial views) with longitudinal dehiscence. Some species of Psilophyton have abundant spines ...
www.ucmp.berkeley.edu

Documents and Settings\Emillies\Desktop\Images\fruits class 05\Chapter1
... with the egg nucleus, and the other generative nucleus unites with two polar nuclei, yielding the zygote and endosperm, respectively. You may want to review ... Syconium (Fig) 2. Fruit consists of tightly clustered ripened ovaries plus the inflorescence axis............................................................ Multiple or Syncarp (Pineapple, Mulberry) 1. Fruit developed from a single flower 3 ...
www.uga.edu




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