You are given a new animal species to study. You note that it possesses segmentation. Based entirely on the knowledge that it is segmented, to which of these phyla might the new species belong? Check all that apply.
A. Chordata.
B. Arthropoda.
C. Cnidaria.
D. Platyhelminthes.
E. Annelida.
Answer: E
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In plants, spores and gametes _____
A) are both produced by mitosis B) are both haploid C) both divide by mitosis D) typically fuse with two other cells to form a new organism E) are made by a sporophyte
Which of the following mechanisms of genetic transfer was first observed by Lederberg and Tatum (1946) in Escherichia coli?
A. Transformation B. Transduction C. Conjugation D. All of the answers are correct
The gastrointestinal tract has both a long tube that nutrients traverse from mouth to anus and accessory organs that aid in food digestion. From the following list of organs in the digestive system, identify the mismatch.
A. Salivary glands; accessory organ B. Pharynx; part of the digestive tube C. Rectum; part of the digestive tube D. Liver; part of the digestive tube E. Appendix; accessory organ
Of these steps, which occurs first in the production of a recombinant plasmid?
A) cloning B) cutting DNA into fragments C) isolation of a plasmid from a bacterium D) reproduction of the engineered plasmid in bacteria