Flowers consist of modified leaves (sepals, petals,
__________, and __________ ) at the ends of
specialized branches. Fill in the blank(s) with the appropriate word(s).
Answer: stamens; carpels
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The complete genetic composition of an organism is called its
A. proteome. B. genome. C. transcriptosome. D. phenotype. E. None of these choices are correct.
You propose an experiment where root hairs of a particular plant species are continuously treated with an antibiotic while nutrient levels in the plant tissue are monitored. Based on your knowledge of root hairs, you hypothesize the plant will experience a deficiency in what nutrient?
A. calcium B. phosphorus C. nitrogen D. carbon E. potassium
Meiosis includes a recombination checkpoint that is analogous to the checkpoints in cell-cycle progression. Double-strand breaks in the DNA initiate recombination in meiosis
The broken end of a DNA molecule finds the corresponding sequence on a homologous chromosome and exchanges a chromosomal segment with its homolog, thereby repairing the break. Ongoing recombination sends a negative regulatory signal that prevents cells from entering meiotic division I. A. Mutations in several genes inactivate the recombination checkpoint. What do you predict will happen if a cell proceeds through meiotic division I before completing recombination? B. What will happen if a cell fails to initiate recombination and proceeds through meiotic division I? Meiotic division II?
During which step of water purification does water moves through sand beds and activated charcoal?
A) Storage B) Filtration C) Chlorination D) Sedimentation E) Aeration and settling