Which of the following statements is true?

geographic isolation is the main cause of speciation.
hybrid organisms always produce sterile offspring.
if a population is spread out over too large area, they may become extinct.
speciation can only happen when a population has very low genetic diversity.

Which of the following describes classical civilizations? they grew slowly and had a very short lifespan. they were unable to carry out long-distance trade. they made lasting impressions in art and architecture.

All of the following are typical characteristics of traditional african religions except a. belief in a creator being b. belief that the dead go onto paradise, and their spirits cannot those left on earth c. belief that all things in nature (including rocks, trees, and animals) have souls d. beliefs are often combined with other faiths, such as christianity

Josh is teaching michael how to be an effective speaker. what two general hints for effective informative speaking should josh share?