Asexual reproduction in the liverwort Marchantia is by means of
A. the detachment of gemmae.
B. the fusion of antheridial and archegonial products.
C. fragmentation of plant tissue.
D. budding of daughter cells.
Answer: A
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Prokaryotes are very important ecologically because of their involvement in all of the following except
A. photosynthesis. B. nitrogen fixation. C. STDs. D. denitrification. E. bioremediation.
Which of the following statements describe a reason ribosomal genes are useful for comparing evolutionary relationships among organisms?
A. There are many differences in these genes, even among closely related species. B. All organisms possess these genes and they can be compared with each other. C. These are the only genes that have been sequenced for every organism on Earth. D. Ribosomes of prokaryotes and eukaryotes are identical. E. It is possible to compare the large subunit genes with the small subunit genes.
In the fern life cycle, the ________ generation is dominant.
A. diploid sporophyte B. haploid gametophyte C. diploid gametophyte D. haploid sporophyte
The higher the pH,
A. the greater the hydroxide ion concentration. B. the more acidic the solution. C. the greater the hydrogen ion concentration. D. the lower the pH number.