Both plants and animals can be manipulated to generate transgenic organisms, but the process is much easier with plants. Explain why it is more difficult to generate transgenic animals than plants
What will be an ideal response?
Plants can take up plasmid DNA from bacteria serving as a vector, but animal cells do not. Consequently, more involved and complicated techniques are necessary to insert DNA into an animal cell. Even if this process is successful, the internal environment of an animal cell can be quite distinct from that of a plant cell, which means that expression of inserted DNA may not occur, or if it does, the protein may not fold correctly and/or get modified in the appropriate way to be functional. Additionally, the number of transgenic animals that can be produced at one time is limited in comparison to plants.
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It could be said that today's Australian marsupials and today's placental mammals have
A. undergone divergent evolution. B. undergone selective advantage. C. undergone heterozygote advantage. D. undergone convergent evolution. E. developed homologous structures.
Methylotrophic bacteria
A. produce methane as a by-product of their metabolism. B. are strict anaerobes. C. use reduced one-carbon compounds as their main source of carbon. D. are members of the Archaea based on 16S rRNA sequencing.
A community
a. includes all populations of all species in a given area. b. features the living organisms interacting with the physical and chemical environment. c. is the sum of all places in Earth's atmosphere, crust, and waters where organisms live. d. includes members of only one species. e. is at a higher level of organization than an ecosystem.
During translation, the nucleotides that make up the mRNA are read in groups of three. These groups are called
A. introns. B. anticodons. C. exons. D. templates. E. codons.