About 2.2 billion years ago, oxygen released by early became fairly abundant in the atmosphere, enabling the evolution of .
photosynthesis ... cellular respiration True or False

When organisms are classified ,they are given a two part name

Chinese privet is a plant that is native to china. over 150 years ago, chinese privet was introduced to the united states as a fast-growing shrub that serves as an excellent privacy hedge. with no natural herbivore, chinese privet quickly established itself and spread in natural areas throughout the southeast and eastern seaboard of the united states. its dominance in these areas has jeopardized the survival of native plant species. chinese privet provides evidence that introducing non-native organisms can cause environmental damage integrated pest management strategies will not decrease chinese privet populations american gardeners can easily control the spread of chinese privet non-native plant species have type i survivorship curves

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?