Biology, 05.08.2020 14:01 Jadaflournoy5
In 1937, a man employed to lay water pipes was found to be the source of a severe epidemic of typhoid fever. The man, an asymptomatic carrier of Salmonella enterica serotype Typhi, the bacterium that causes typhoid, habitually urinated at his job site. In the process, he contaminated the town's water supply with bacteria from his bladder. Over 300 cases of typhoid fever developed, and 43 people died before the man was identified as the carrier.
How was this carrier identified?
a) nasal swab
b) sputum sample
c) throat swab
d) urine culture
Answers: 3
Biology, 22.06.2019 07:00
When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated
Answers: 1
Biology, 22.06.2019 13:00
14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.
Answers: 2
Biology, 22.06.2019 14:20
When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?
Answers: 1
In 1937, a man employed to lay water pipes was found to be the source of a severe epidemic of typhoi...
History, 05.12.2019 09:31
Business, 05.12.2019 09:31
Spanish, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31
History, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31
Mathematics, 05.12.2019 09:31