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. Hydrogen bonds hold water molecules together; many hydrogen bonds must be broken for water to evaporate.
B. The surface tension created by hydrogen bonds is greater than the weight of the lizard initially.
C. Polar molecules are attracted to ions and polar compounds, making these compounds soluble.
D. Hydrogen bonds absorb heat when they break and release heat when they form. This helps to minimize temperature changes.
Answer: B
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If a single gene has 3 or more alternative forms, this is called
A. pleiotropy. B. multiple alleles. C. epistasis. D. blending inheritance. E. codominance.
What kind of molecular information is commonly used to study phylogeny among ORGANISMS that diverged from a common ancestor relatively long ago?
A. Whole genomes because they are easy to obtain. B. Segments of cellular membrane proteins because the proteins, coded by DNA, are found in all living organisms. C. The mitochondrial genome because it easily incurs neutral mutations. D. Small ribosomal subunit (SSU) RNA because it is found in the genomes of all living organisms. E. DNA sequences within introns because their sequences change rapidly over evolutionary time.
If predictions about a hypothesis are not supported by data,
A. Further tests can be conducted B. The hypothesis is not supported C. The hypothesis can be modified D. All of the above
When people have health issues associated with their kidneys doctors may prescribe diuretic drugs. Why would someone with high blood pressure be prescribed these drugs?
A. Diuretic drugs decrease urine flow and the kidney does not have to work as hard. B. Diuretic drugs increase urine flow and salt loss and salt was bad for the heart. C. Diuretic drugs decrease urine flow and the more fluid and watery blood is easier to pump. D. Diuretic drugs increase urine flow and the loss of nitrogenous wastes helps the heart. E. Diuretic drugs increase urine flow and decrease the blood volume that must be pumped.