What other information is related to the question? Which information is most useful?
What will be an ideal response?
When salt dissolves in water the NaCl dissociates into Na+
and Cl-ions. Each of these ions interact with water molecules. The Na+ will be attracted to the partial negative charge on O in water and the Cl-ions will be attracted to the partial positive charge on H in water.
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Multiple models were proposed to explain replication. What experimental approach allowed researchers to distinguish between them?
A. Cells were pulsed with high specific activity [3H] thymidine to show the direction of DNA synthesis on the chromosome. B. Cells infected with T4 bacteriophage were grown in the presence of radioactive nucleotides. When DNA was analyzed in alkaline CsCl gradients, the presence of short DNA fragments indicated that discontinuous replication had occurred. C. Bacteria were grown on 15NH4 until the entire DNA contained heavy nitrogen and then the cells were transferred to normal, light media for one round of replication. The resulting DNA molecules were separated in density gradients and compared to the expected results for each proposed model. D. Bacteria were grown on [3H] thymidine until the entire DNA contained heavy thymidine and then the cells were transferred to normal, light media for one round of replication. The resulting DNA molecules were separated in density gradients and compared to the expected results for each proposed model. E. None of these choices is correct.
The accompanying figure is a micrograph of what kind of tissue?
a. cardiac muscle b. skeletal muscle c. smooth muscle d. cartilage e. dense connective
Vitamin C is required to produce collagen. What is collagen, and what would be the symptoms of a vitamin C deficiency?
What will be an ideal response?
Which statement about mycorrhizae is FALSE?
a. They are symbiotic associations between a fungus and a plant root. b. They increase the uptake of nutrient minerals by the plant.
c. Arbuscular mycorrhizae are extracellular. d. Endomycorrhizae are intracellular. e. Members of the Glomeromycota may be involved.