Polecamy Artykuły Nowości
Cumulonimbus arcus – łuk burzowy
Czym jest i jak powstaje łuk burzowy?
Podziały kwadratu i twierdzenie…
Na ile trójkątów o rozłącznych wnętrzach można podzielić kwadrat? Na ile trójkątów o rozłącznych wnętrzach i jednakowych polach można podzielić kwadrat?
Żaby uzbrojone po zęby
Jakie szanse w starciu z drapieżnikiem ma mała kolorowa żabka? Jeśli tą żabką jest drzewołaz, to zaskakująco duże. Sprawdź, w czym tkwi źródło siły tych płazów.
Wiosna się spóźniła, nie wszystkie…
Od dwóch dni trwają matury. Mimo że nie zakwitły kasztany, wszystkim maturzystom życzymy pomyślnie zdanych egzaminów.
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<p class="MsoNormal"><span style="font-size:16.0pt;line-height:115%;mso-bidi-font-weight:
bold">Fragment haczykowatych łusek okrywy koszyczka kwiatowego (popularnie nazywanego
rzepem).</span></p>
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Łopian, przydrożny chwast, stał się…
Idąc polną drogą, na przykład w czasie wakacji, zwróćcie uwagę na koszyczki kwiatowe łopianu. Dzięki obserwacji przyczepnych rzepów, ludzie wymyślili taśmy, których używa się powszechnie w przemyśle odzieżowym, np. do zapinania kurtek, butó…