The question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (for example, Intron I is the one closest to the promoter). The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.

Based on the tabular data, and assuming that time advances vertically, which phylogenetic tree is the most likely depiction of the evolutionary relationships among these five species?

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#Question id: 4742

#SCPH12 I Genetics

In birds, sex is determined by a ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?

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#Question id: 3039

#SCPH28 | Zoology

An inoculated thioglycolate medium culture tube shows dense growth at the surface and turbidity throughout the rest of the tube. What is your conclusion?

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#Question id: 11544

#I Life Science/ Life Sciences Group – I-V

When a steroid hormone and a polypeptide hormone exert similar effects on a population of target cells, then ________.

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#Question id: 15914

#SCPH05 I Biotechnology

What is animal tissue culture? 

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#Question id: 9170

#SCPH28 | Zoology

Which of the following is an important feature of most terrestrial biomes?