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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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.
Melanin protects the skin from
a. desiccation. b. abrasion. c. ultraviolet radiation. d. infrared damage. e. invasion by bacteria
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.
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.