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1 | |
An important function of lipids for marine birds is which? |
| | A) | carrying oxygen in the blood |
| | B) | structural support |
| | C) | keeping feathers dry |
| | D) | speeding up metabolic processes. |
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2 | |
Like complex carbohydrates, nucleic acids are large molecules, but unlike carbohydrates, they contain which of these? |
| | A) | carbon |
| | B) | hydrogen |
| | C) | oxygen |
| | D) | nitrogen |
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3 | |
The direct function of genes is to |
| | A) | code for a trait, such as blue eyes. |
| | B) | allow natural selection to proceed. |
| | C) | specify the order of amino acids in one protein. |
| | D) | make perfect copies of each strand of DNA. |
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4 | |
In photosynthesis, |
| | A) | carbon dioxide and water are used to produce glucose. |
| | B) | glucose is broken down into carbon dioxide and water. |
| | C) | energy stored in organic matter is transferred to ATP. |
| | D) | carbon is converted to an inorganic form. |
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5 | |
In the ocean, the most important nutrient is |
| | A) | nitrate. |
| | B) | phosphate. |
| | C) | silicate. |
| | D) | iron. |
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6 | |
Unlike animal cells, plant cells have which of these? |
| | A) | flagella |
| | B) | a nucleus |
| | C) | mitochondria |
| | D) | a cell wall |
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7 | |
A salmon is an osmoregulator. As it moves out of fresh water into seawater, what happens? |
| | A) | Water tends to move out of its tissues. |
| | B) | Water tends to move into its tissues. |
| | C) | The fish must excrete more water |
| | D) | The fish must retain more salt. |
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8 | |
A biologist suspects that a polychaete worm uses active transport to remove a pollutant from its tissues. Evidence for this idea would be which of the following? |
| | A) | an increased concentration of the pollutant at the exits of its excretory organs as opposed to inside its tissues |
| | B) | presence of excretory organs |
| | C) | a greater concentration of the pollutant in the sediment outside the worm than inside of it |
| | D) | survival of the worm in polluted mud |
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9 | |
Tunas are considered to be poikilotherms because |
| | A) | their internal temperature remains the same despite external changes. |
| | B) | they cannot retain heat generated by their muscles. |
| | C) | they do not have blubber. |
| | D) | their internal temperature varies with the temperature of the water outside. |
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10 | |
To be a large animal but have a high surface to volume ratio |
| | A) | is impossible. |
| | B) | can happen if the animal is nearly flat. |
| | C) | can happen in a spherical animal. |
| | D) | can happen if the animal can regulate its body heat. |
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11 | |
In sexual, but not asexual, reproduction |
| | A) | buds can break off. |
| | B) | meiosis occurs. |
| | C) | cell division occurs |
| | D) | offspring are genetically identical to the parent. |
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12 | |
Strictly speaking, evolution refers to |
| | A) | genetic changes in populations. |
| | B) | survival of the best-adapted individual. |
| | C) | the origin of life. |
| | D) | the establishment of new species. |
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13 | |
In a museum's catalog of specimens, a biologist reads "Echinoidea: Echinidae: Echinus esculentus". She can assume from the label that |
| | A) | someone made a mistake. Only two names should be used. |
| | B) | someone made a mistake. The first three names are identical. |
| | C) | Echinoidea is a class and Echinidae is a family. |
| | D) | The first two names should be underlined or in italics. |
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14 | |
The Archaea are now considered separate from Bacteria because |
| | A) | there are differences in their RNA. |
| | B) | they have more than one cell. |
| | C) | they have mitochondria. |
| | D) | they have no metabolism. |
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15 | |
A zygote |
| | A) | forms by meiosis. |
| | B) | is diploid. |
| | C) | is haploid. |
| | D) | forms after cell division. |
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