The incorporation of DNA into the information transfer system was advantageous because DNA is a
catalytic molecule.
________ Indicate whether the statement is true or false.
F, stable
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If the multiregional hypothesis of human origins is correct, modern human populations last shared a common ancestor around _____ years ago. If the out-of-Africa hypothesis is correct, we last shared a common ancestor around _____ years ago
A. 2 million; 200,000 B. 3.2 million; 2 million C. 5-7 million; 2 million D. 5-7 million; 200,000 E. 3.2 million; 200,000
The production of random evolutionary changes in small breeding populations is
1.gene flow. 2.genetic drift. 3.founder effect. 4.mutations. 5.migration.
Answer the following questions true (T) or false (F)
1. When an endospore germinates, it gives rise to two daughter cells called vegetative cells. 2. Various species of Streptomyces are important sources of antibiotics. 3. Halophiles grow equally well in the presence or absence of high salt concentrations.
Which of the following is part of the structure of the mitochondria of a eukaryotic cell?
A. cilia B. cristae C. thylakoids D. inclusions E. nucleolus