Who proposed that missouri be allowed to enter the union as a slave state if no more slaves were brought into missouri after that? a.)john c. calhounb.)henry clayc.)james tallmadged.)thomas jefferson

Which of these is a major trend in land plant evolution? a) the trend toward smaller size b) the trend toward a gametophyte-dominated life cycle c) the trend toward a sporophyte-dominated life cycle d) the trend toward larger gametophytes

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

Which of these is one of the nitrogenous bases in dna? a. proline b. leucine c. glycine d. thymine