What two simple machines is a wheelbarrow made up of? 1 Wheel and wedge
2 Wedge and lever
3 Wedge and screw

3 Wheel and lever

Ineed the answer asap. in order to be considered alive, an organism must simultaneously possess the characteristics of homeostasis, heredity, cells, reproduction, and

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?

20 how are energy cycles and growth cycles related?