The bacteria that today are most similar to chloroplasts are

A. thermoacidophiles.
B. methanogens.
C. nonsulfur purple bacteria.
D. cyanobacteria.


Answer: D

Biology & Microbiology

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Which of the following might be a result of adding a secondary consumer to the aquatic ecosystem illustrated above?

A) a decrease in the number of primary consumers B) a decrease in the population of decomposers C) an increase in atmospheric carbon dioxide D) an increase in the population of scavengers E) a decrease in the carbon sink

Biology & Microbiology

The cell walls of fungi are composed mainly of

a. hyphae. b. cellulose. c. chitin. d. phospholipids. e. mycelia.

Biology & Microbiology

If alleles L, M, and N are on the maternal

chromosome and l, m, and n are on the paternal chromosome, the only way that a gamete from a heterozygote will produce a gamete with alleles l, m, and N is through a. nondisjunction. b. the laws of segregation. c. the law of independent assortment. d. crossing over. e. chromosome aberration.

Biology & Microbiology

The process that merges the gametes from two parents is

A. fertilization. B. conjugation. C. meiosis. D. mitosis. E. parthenogenesis.

Biology & Microbiology