Homo sapiens are the sole surviving hominid.
Answer the following statement true (T) or false (F)
True
Homo sapiens are the sole surviving hominid.
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Melanin protects the skin from
a. desiccation. b. abrasion. c. ultraviolet radiation. d. infrared damage. e. invasion by bacteria
You are studying regulation of a prokaryotic operon. Experiments show that expression of the operon is increased when levels of biosynthetic product from that pathway are low. Based on this information, what is a likely mode of regulation?
A. The product binds to the biosynthetic enzymes, blocking them directly. B. The product binds a repressor, preventing it from binding the operator. C. The product binds an activator, helping RNA polymerase to bind the promoter. D. The product binds a repressor, allowing it to bind the operator.
An agar plate for counting colonies and maximizing statistical validity should ideally contain
A) 1 to 100 colonies. B) 50 to 100 colonies. C) 30 to 300 colonies. D) 100 to 1000 colonies.
If a population of 1000 individuals has 160 aa genotypes, 320 Aa genotypes, and 520 AA genotypes,
the allele frequency of the dominant allele (A) is: a. 0.16 b. 0.42. c. 0.52. d. 0.68. e. 0.89.