What is a tenet of the cell theory?
A. All organisms consist of more than one cell.
B. All living cells arise by division of preexisting cells.
C. Each cell makes its own hereditary material.
D. Each cell is composed only of products that it manufactures.
E. Cells may arise spontaneously under certain laboratory conditions.
Answer: B
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Which of the following is true of Domain Archaea compared to other groups?
A) They are the only anaerobes on Earth. B) None of their genes work like those found in eukaryotes. C) Their cell wall and membrane biochemistry is unique. D) Most of their genes are similar to those found in bacteria. Refer to the scenario below, and then answer the following question(s). As part of your field biology independent study, you visit a small lake with an extremely high salt concentration. Searching with nets and other sampling devices, you find no fish, plants, algae, or any visible signs of life in the lake. Still, you decide to take a few samples of the water back to the lab. You find the sample teeming with very small cells, hundreds of times smaller than a typical human cell. These cells have cell walls, which you analyze chemically and find they are not made of peptidoglycan or cellulose.
A potential consequence of continued human population growth could be which of the following?
a. Humans change from exponential to logistic growth patterns. b. Carrying capacity of the planet will increase. c. Life expectancy decreases as resources become limited. d. Life expectancy increases as resource become more abundant.
Interspecific competition involves individuals of two or more species vying for the same limited ________
Fill in the blank(s) with correct word
Which of the following best describes the genetic material a person receives from his or her father?
A.) 22 pairs of homologous chromosomes and an X and Y chromosome B.) 22 haploid cells and an X or Y chromosome C.) 23 diploid cells and an X and Y chromosome D.) 22 autosomes and an X or Y chromosome