Bernstein, Aaron, Naturwissenschaftliche Volksbücher, Bd. 1/5, 1897

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      <text xml:lang="de" type="free">
        <div xml:id="echoid-div69" type="section" level="1" n="42">
          <pb o="98" file="108" n="108"/>
          <p>
            <s xml:id="echoid-s1351" xml:space="preserve">Unſere Abbildung Fig. </s>
            <s xml:id="echoid-s1352" xml:space="preserve">31 zeigt bei II ein vier- und ein
              <lb/>
            fünfzelliges Stück gewiſſer jener grünen, feinen Algenfäden, die
              <lb/>
            in unſeren Teichen, Steine und dergleichen überziehend, überall
              <lb/>
            zu finden ſind, neben einander liegend und in eigentümlicher
              <lb/>
            Weiſe mit einander verwachſen. </s>
            <s xml:id="echoid-s1353" xml:space="preserve">Urſprünglich war jeder dieſer
              <lb/>
            beiden Fäden frei wie das Fadenſtück I: </s>
            <s xml:id="echoid-s1354" xml:space="preserve">ſie haben ſich ihrer
              <lb/>
            Länge nach parallel an einander gelegt und die gegenüber
              <lb/>
            liegenden Zellen der Fäden haben zuerſt kleine Ausſackungen,
              <lb/>
            die gegen einander gerichtet ſind, gebildet, wie dies bei a und b
              <lb/>
            zu ſehen iſt. </s>
            <s xml:id="echoid-s1355" xml:space="preserve">Dieſe Ausſackungen ſtellen — wie c veranſchau-
              <lb/>
            licht — durch Auflöſung der trennenden Wand eine offene
              <lb/>
            Verbindung zwiſchen den beiden Zellen her. </s>
            <s xml:id="echoid-s1356" xml:space="preserve">Der eigentümlich
              <lb/>
            geſtaltete, ſchleimig-flüſſige (protoplasmatiſche) Inhalt jeder
              <lb/>
            Zelle mitſamt dem grünen Spiralbande hat ſich zu einer
              <lb/>
            Kugel zuſammengeballt, und der Inhalt der einen iſt ſchließ-
              <lb/>
            lich in die andere Zelle durch den entſtandenen Kanal hinüber-
              <lb/>
            gewandert, um hier mit der Protoplasma-Kugel dieſer Zelle
              <lb/>
            zu verſchmelzen. </s>
            <s xml:id="echoid-s1357" xml:space="preserve">Bei c iſt der Inhalt der Zelle links auf
              <lb/>
            der Wanderung in die Zelle rechts und Vereinigung mit dem
              <lb/>
            Inhalt derſelben begriffen. </s>
            <s xml:id="echoid-s1358" xml:space="preserve">Bei d iſt die Vereinigung voll-
              <lb/>
            zogen, und das entſtandene protoplasmatiſche Gebilde Sp um-
              <lb/>
            giebt ſich dann (III) mit einer feſten Haut. </s>
            <s xml:id="echoid-s1359" xml:space="preserve">Dieſes Gebilde
              <lb/>
            (III) nun wächſt unter günſtigen Bedingungen und nachdem
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            es eine Ruheperiode im Grunde des Gewäſſers durchgemacht
              <lb/>
            hat, zu einem neuen Algenfaden aus.</s>
            <s xml:id="echoid-s1360" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s1361" xml:space="preserve">Die geſchilderte Fortpflanzungsweiſe iſt die, die man die
              <lb/>
              <emph style="sp">geſchlechtliche</emph>
            nennt.</s>
            <s xml:id="echoid-s1362" xml:space="preserve"/>
          </p>
        </div>
        <div xml:id="echoid-div71" type="section" level="1" n="43">
          <head xml:id="echoid-head54" xml:space="preserve">
            <emph style="bf">IV. Blumen und Blüten.</emph>
          </head>
          <p>
            <s xml:id="echoid-s1363" xml:space="preserve">Nur ſo viel über die einfacheren Fortpflanzungsorgane.
              <lb/>
            </s>
            <s xml:id="echoid-s1364" xml:space="preserve">Wir wollen nach dieſer Vorbereitung zu einer näheren Be-
              <lb/>
            trachtung der höheren Pflanzen eingehen, um zur </s>
          </p>
        </div>
      </text>
    </echo>
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