The idea that H. erectus populations in Africa, the Middle East, and Asia all collectively interbred and

evolved into H. sapiens is called the ____________________ hypothesis. Fill in the blank(s) with the appropriate word(s).


ANS: multi-regional

Biology & Microbiology

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The microbiologist receives a sputum specimen for culture in the microbiology laboratory. Upon receipt the microbiologist should:

a. complete the set-up of media for identifi-cation of pathogens. b. complete a direct Gram stain and prelimi-nary report. c. complete an abbreviated work-up of the specimen. d. complete a culture and definitive identifi-cation of pathogens.

Biology & Microbiology

Where do sperm form?

a. The vas deferens b. The epididymus c. The corpus cavernosum d. The seminiferous tubules

Biology & Microbiology

DNA contains many different gene regions that are transcribed into different ________

a. proteins b. polypeptides c. RNAs d. [proteins] and [polypeptides]

Biology & Microbiology

What do enzyme-linked receptors and growth factor receptors have in common?

A. Both regulate specific G proteins when bound to a hormone. B. Both regulate the transport of ions through channels. C. Both seldom affect the expression of genes within the nucleus. D. Both possess kinase activity when bound to a hormone. E. Both act as transcriptional factors.

Biology & Microbiology