The genomes of Arabidopsis thaliana, a small member of the mustard family of plants, and rice, Oryza sativa, have been sequenced. The findings include 

A. the genome for each is almost identical, indicating that they diverged in the fairly recent past.
B. they each have very high copy numbers (slightly divergent copies of a gene), probably indicating episodes of polyploidy and/or segmental duplication.
C. repetitive DNA, including retrotransposons, was a very small proportion of both genomes.
D. more than 90% of the genes in each were particular to plants and not found in animal or fungal genomes.


B. they each have very high copy numbers (slightly divergent copies of a gene), probably indicating episodes of polyploidy and/or segmental duplication.

Biology & Microbiology

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Homologous chromosomes are held together in the

A) synaptonemal complex. B) centromere. C) kinetochore. D) nucleus. E) MTOC

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Which term describes the vital statistics of a population?

a. ecostatistics b. population ecology c. demographics

d. biostatistics e. community ecology

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In transduction, two prokaryotic cells of different mating types come together and genetic material is transferred from

one cell to another Indicate whether the statement is true or false.

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The correct order in which a light ray reaches the retina is:

A. lens-vitreous humor-cornea-aqueous humor-retina. B. lens-aqueous humor-cornea-vitreous humor-retina. C. cornea-vitreous humor-pupil-lens-aqueous humor-retina. D. lens-cornea-aqueous humor-vitreous humor-retina. E. cornea-aqueous humor-pupil-lens-vitreous humor-retina.

Biology & Microbiology