A nucleic acid contains uracil, allowing you to conclude that:
A. this nucleic acid could be either DNA or RNA.
B. this nucleic acid is RNA.
C. this nucleic acid is DNA.
Answer: B
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Answer the following statements true (T) or false (F)
1. Skeletal muscle is under voluntary control. 2. Cardiac muscle is under voluntary control. 3. An organ can consist of a single type of tissue. 4. Most of the water found in the body is in the intracellular fluid compartment.
Water induces embryonic plant cells to release the hormone ________
a. gibberelin b. ABA c. auxin d. ethylene
You discover a fungus that makes mainly asexual spores, but that occasionally makes sexual spores
When produced, the sexual spores come out of a thickened, hardened structure. A close examination of hyphae of this fungus reveals no septa. Into which group should you classify this fungus?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
The common basilisk lizard will run across water on its hind legs in an erect position when startled by predators. This lizard has large feet and flaps of skin along its toes. What properties of water allow this lizard to walk on water?
A. Polar molecules are attracted to ions and polar compounds, making these compounds soluble. B. Hydrogen bonds absorb heat when they break and release heat when they form. This helps to minimize temperature changes. C. Hydrogen bonds hold water molecules together; many hydrogen bonds must be broken for water to evaporate. D. The surface tension created by hydrogen bonds is greater than the weight of the lizard initially.