The impacts of the microbial types that inhabit cross-sections of water sediment are vast. Consider that sediments deep beneath water surfaces are home to perhaps ________ of the world's bacterial and archaeal biomass.
A. 50%
B. 95%
C. 20%
D. 10%
Answer: A
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Which of the following represents the correct order?
Shown below are steps in making a transgenic plant. 1. Expose plant cells to Agrobacterium tumefaciens 2. Place plant cells on selective medium 3. Transform the recombinant plasmid into Agrobacterium tumefaciens 4. Insert gene of interest into Ti plasmid 5. Place plant cells on growth medium with plant hormones A. 5 - 1 - 4 - 3 - 2. B. 4 - 3 - 1 - 2 - 5. C. 4 - 1 - 3 - 5 - 2. D. 2 - 4 - 1 - 3 - 5. E. None of the choices shows the correct order.
A male develops a trait that makes it a more attractive mate to females. What type of selection is occurring?
a. disruptive b. dominant c. gender d. mating e. sexual
Crossing two pink snapdragons yields some seeds that produce red-flowering plants, some seeds that produce white-flowering plants and some seeds that produce pink-flowering plants. If this trait operates by incomplete dominance and the allele R
represents red flowers and the allele r represents white flowers, what genotype would a plant with pink flowers have for this trait? A) rr B) RrRr C) RR D) Rr
All of the following are contiguous membrane domains except
a. rough ER. b. secretory granules. c. smooth ER. d. transitional ER.