The FtsZ gene in bacteria encodes an ancestral tubulin that is important in binary fission (the mechanism of cell division in prokaryotes). To study the FtsZ gene in eukaryotes, researchers made an FtsZ knockout in the moss What is true about this knockout plant?
A. The knockout plant is heterozygous for an abnormal FtsZ gene.
B. The knockout plant does not produce any normal FtsZ protein.
C. The knockout plant contains a copy of the bacterial FtsZ gene.
D. The knockout plant makes bacterial FtsZ protein.
E. The knockout plant makes half the normal amount of FtsZ protein.
B. The knockout plant does not produce any normal FtsZ protein.
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The genetic information in viruses
A. is single-stranded DNA. B. is single-stranded RNA. C. can be DNA or RNA, and single- or double stranded. D. is double-stranded RNA. E. is double-stranded DNA.
Circular DNA that is apart from the chromosome DNA in some prokaryotes is called a(n)
A. endospore. B. nucleoid. C. ribosome. D. plasmid. E. nucleus.
Spot desmosomes are actually ________ junctions, which allow for slight flexibility in an epithelium
Fill in the blank(s) with correct word
According to the diversity-stability hypothesis:
A. A loss of any species from an ecosystem leads to an approximately equal decline in stability. B. Losing even a few species from an ecosystem causes a drastic decline in ecosystem stability. C. The loss of a few species from an ecosystem does significantly affect ecosystem functioning. D. Every species has an important role in ecosystem function, but we cannot predict the effect of species loss. E. Genetic diversity is the most important part of ecosystem stability.