复时间 2022-09-28 2023-12-13 2024-04-13 2025-04-12 Adaptations of Marine Mammals     Warm-blooded marine mammals and birds require some special adaptations to permit t...

Opera in Seventeenth-Century Venice     Opera, a form of drama set to music and featuring vocal performance supported by an orchestra, was born in Italy at the very end ...

Tyrannosaurus rex: Predator or Scavenger? Tyrannosaurus rex was among the largest of the theropods, a group of mostly carnivorous (meat-eating) dinosaurs that roamed the Earth dur...

复时间 2022-06-07 2025-04-12 Early Domestication and Agriculture     To some extent, the causes of agriculture are to be found in the thousands of years of hunting-ga...

  Periglacial Mounds   Periglacial regions are cold-climate areas that are located near the margins of glaciers-permanent ice sheets covering parts of the Arctic and ot...

WS 032C2

Early Food Production in Africa   Farming appeared in Africa by 5000 B.c.E. Eventually, several different styles of food production developed. These variations were caused by ...

TF阅读真题第858篇Late Classic Maya Agriculture

Mycorrhizae     Fungi are organisms, including mushrooms, yeasts, and molds, that absorb and decompose organic material. Most land plants have specialized roots that con...

Insect Colony Movement     In general, colonies of social insects such as bees or ants move either to change nesting sites when the current site deteriorates in quality,...