Tall (D) is dominant to dwarf (d). Give the F2 genotypic and phenotypic ratios of a cross between a
pure-breeding tall plant and a pure-breeding dwarf plant. What will be an ideal response?
1 DD, 2 Dd, 1 dd; 3 tall, 1 dwarf
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A bacterium containing ________ provided with hydrogen peroxide will produce oxygen bubbles
A) catalase B) superoxide dismutase C) superoxide reductase D) peroxidase
The human body is colonized by a variety of bacteria that reside in very specific sites or anatomical locations throughout. These organisms are classified as:
a. opportunistic pathogens. b. infectious organisms. c. normal resident organisms. d. normal human microbiota.
Briefly explain why animals that live in very dry climates have the longest nephron loops
What will be an ideal response?
In an experiment, Jokela et al. reared 14 replicate populations of a snail that is poly-morphic for sexual/asexual reproduction under controlled identical conditions in the lab
Each population started with 35% asexual and 65% sexual experiments. The figure be-low shows the proportions of asexual after a year-long experimental run. What are possible explanations for this result? a. All asexuals survived better under the experimental conditions. b. Asexual females produced more offspring per individual than sexual fe-males. c. The cost of males leads to faster population growth for the asexual sub-population. d. A novel mutation after the start of the experiment led to the increased sur-vival of the asexual line with the mutations. e. A, B, and C.