Tornadoes are common in areas of flat plains because
1. flat plains receive the most heat
2. flat plains receive the most moisture
3. winds are able to flow without obstruction
4. thunderstorms are common in flat plain regions

Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations