Search Results for terminal-node
1-16 of 16 Search Results for
The American Biology Teacher (2019) 81 (8): 543–552.
Published: 01 October 2019
.... However, abstracted from the experience of nature's patterns, the tree metaphor, rather than being enlightening, can be ominous and confusing. In The Book of Trees , author Manuel Lima (2014) explains how the vertical and horizontal form of a tree – with roots, growing tips, nodes, and leaves – became...
The American Biology Teacher (2019) 81 (2): 133–136.
Published: 01 February 2019
... evolutionary relationships. It is also very hard. Without targeted instruction many students leave college courses unable to interpret even simple trees (e.g., Novick & Catley, 2007 ). For example, students often think that the order of terminal nodes in a tree indicates relatedness and so assume that two...
The American Biology Teacher (2016) 78 (5): 380–384.
Published: 01 May 2016
... determined by observation of the features of the terminal taxa. Historical narratives of ancestry and descent are inferred from these character distributions. Relationships in a pedigree are based on direct historical knowledge of who begat whom (consanguinity). Internal nodes on a cladogram are hypothetical...
The American Biology Teacher (2014) 76 (2): 127–131.
Published: 01 February 2014
... . 2014 Phylogeny morphology parsimony clade cladistics polytomy synapomorphy Occam’s razor homoplasy homology node terminal node branch transition root natural taxon sister group out group References Elbroch, M. (2006). Animal Skulls: A Guide to North American Species...
The American Biology Teacher (2003) 65 (1): 13–23.
Published: 01 January 2003
... pneumonic) occur and ask them to suggest which form would be most worrisome. It is important to know that pneumonic plague can develop from bubonic by the bacteria spreading from the lymph nodes to the respiratory system. Assign the exploration prior to the class topic of cell communication or immunology...
The American Biology Teacher (1991) 53 (8): 484–485.
Published: 01 November 1991
..., + PO(lyoma) + VA(cuolation) + virus] PARATHORMONE [from PARATH(yroid) + (h)ORMONE] QUADRUPED [from QUADRU(manous) + PED(al)] REOvrius [from R(espiratory) + E(nteric) + O(rphan) + virus] SA node [from S(inu) + A(trial)+ node] UROPYGIUM [from URO(chordal) + PYG(id)IUM] VAGILE [from VAG(uely) + (mob)ILE...
The American Biology Teacher (1990) 52 (5): 288–290.
Published: 01 May 1990
... affected father can transmit trait to a son; two unaffected parents cannot have an affected daughter. Sex Infuenced-Female Dominant: Heberden nodes (14060) more females affected than males; all daughters of an affected father will be affected; two unaffected parents cannot have an affected daughter. . . 1...
The American Biology Teacher (1987) 49 (2): 99–102.
Published: 01 February 1987
... node, which may remain small, hard and tense, but more frequently enlarged to the size of a walnut or goose egg and is embedded in boggy edema. In the septic variety, nervous and cerebral symptoms supervene with striking rapidity; although the temperature is rarely above 100 degrees F., epi- staxis...
The American Biology Teacher (1982) 44 (1): 44–65.
Published: 01 January 1982
... tree' without using any equipment. They may assume that each major node of branches on the stems of young pine FIGURE 1. The tall trees are Douglas firs. A few Oregon white oaks are in the center. 44 THE AMERICAN BIOLOGY TEACHER, VOLUME 44, NO.1, JANUARY1982 trees represents one year. By count- ing...
The American Biology Teacher (1973) 35 (7): 407–419.
Published: 01 October 1973
... terminal nodes connected by a thick strand; (ii) elongate-cylindric (filiform), sometimes with more or less enlarged ends; (iii) beaded (moniliform), consisting of a string of macro- nuclear nodes connected by slender strands; and (iv) ovoid-compact, a single mass. A filiform macro- nucleus is...
The American Biology Teacher (1966) 28 (6): 478–491.
Published: 01 August 1966
... few pots of tomato plants 6-8 weeks old. Make a fresh transfer of Agrobacterium tumefaciens, the crown gall organism, to nutrient agar (cf. Appen- dix I and II pp. 494, 501). Sterilize an inocu- lating needle and transfer bacteria from the slant culture into punctures made in inter- nodes of the...
The American Biology Teacher (1965) 27 (2): 106–112.
Published: 01 February 1965
... plants are used as a control, and the other half are painted with a solution containing 100 ppm of gib- berellic acid on the internode above the first true leaves. Measurements in cm are made daily of the length of each group of plants or length from leaf node to bud tip. Average length or standard...
The American Biology Teacher (1965) 27 (2): 118–123.
Published: 01 February 1965
... stalks and suffering subsequent throat paralysis for several days. Satisfactory as these plants are in the lab, they must be handled with care. As the stalk elongates, it is usual to cut off the leafy top and re-root it in water and then cut up the rest of the stalk into three- or four-node lengths. In...
The American Biology Teacher (1965) 27 (2): 97–100.
Published: 01 February 1965
... opposite each other, or nearly so. Students jump to the conclusion that this pattern will continue, but it doesn't. When the measurements are plotted each day as they are made, and if they are made always from the same side, it soon becomes obvious that there is only a single leaf at a node, though some...
The American Biology Teacher (1962) 24 (3): 167–176.
Published: 01 March 1962
... whic folw txt HEART AND NERVE DYNAMICS 175 the heart are connected with each other, the pace is normally set by the part with the high- est frequency of automaticity. This is the sinus venosus in the turtle; it is the sino-atrial node in the right atrium in higher animals. If the atria and the...
The American Biology Teacher (1961) 23 (3): 160–164.
Published: 01 March 1961
... den- tist, (1836-1895) observed dentinal canal processes. Ranvier's node-Louis Ranvier, French pathologist, (1835-1922) observed con- strictions on medullated (sheathed) nerves. Scarpa's triangle-Antonia Scarpa, Italian anatomist, (1747-1832) observed a tri- angle formed by two muscles and a ligament...