Which biome is represented by the map and climate diagrams?
A) deciduous forest
B) coniferous forest
C) tropical forest
D) tundra
B
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Which of the following statements about the growth of the human population is correct?
A. None of the answer options is correct. B. The human population has been growing at the same rate since 1800. C. The human population quadruples in size every century. D. The human population has doubled in size in the past 10 years. E. The human population first reached 1 billion in the 20th century.
In nature, what is the order of events in processing the product of the gene for insulin?
A) cleavage of 35 amino acids from the middle of the polypeptide to make two chains that are then joined by disulfide bonds B) cleavage of 24 amino acids from the N terminus to form proinsulin that is subsequently cleaved to make A and B chains C) removal of 5? leader sequence from the mRNA, and splicing out of a large central intron to produce the mRNA that codes for the final form of polypeptide D) removal of large mRNA sequences by RNA editing, followed by splicing of the products of the two insulin genes E) transcription of the two insulin genes A and B, translation, and posttranslational joining of the two polypeptides
A competent Hemophilus strain is individually transformed by three genes (a, b, and c) at a rate of 0.002% each. However, cotransformation frequencies for each pair are as follows: a and b 0.38 % a and c 0.72% b and c 0
19% What is the correct conclusion from this data? A) Genes b and c are farthest apart. B) Gene order is c, b, a. C) Cotransformation of b and c is so frequent, they must be one gene. D) Gene a is closer to b than to c. E) Genes a and c are farthest apart.
In sickle cell anemia, affected individuals carry ____
a. one of several different nucleotide substitutions b. the same single nucleotide substitution c. more than one nucleotide substitution
d. a number of mutant alleles e. one mutant allele in several genes