Think of a scenario where human activities affect the biodiversity in an ecosystem. describe the activity and the effect it has on the species in the ecosystem. give at least two specific example.

[ou.01jthe greatest speed with which any physical object moves is 300,000 km/soundsec. which of the following has a speed of 300,000 km/sec? a.light in water b.light in vacuum c.sound in air. d. sound in water

In 1200 bce, the egyptian empire was declining as the civilization was beginning in mesoamerica. a. maya b. oaxaca c. olmec d. teotihuacan

Which of the following is an accurate description of the recent political history of the democratic republic of the congo? a. religious tensions have escalated into full-scale civil war a number of times since the belgians left the country in 1960. b. the political leader who gained power after the overthrow of a corrupt dictator was assassinated. c. the military leadership felt the country was stable enough, so they permitted democratic elections to take place. d. in 1990, a dictator seized and has held power ever since.