The Atlantic cod population decreased dramatically during the 1900s due to overfishing. What conservation measure, presently being applied, is most likely to help this fish population recover?
A) Putting a bounty on sharks and tuna in the area that would otherwise eat the cod
B) Fertilizing the ocean with raw sewage to cause eutrophication, thus increasing productivity
C) Establishing marine reserves in the area that prohibit fishing until stocks recover
D) Encouraging selective fishing on haddock, turbot, and other species that compete with cod for food
E) Spreading silt in the water to reduce UV radiation damage to sensitive cod eggs
C
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In the U.S., the ____________________, a standardized set of thirteen STR alleles, is used to generate DNA profiles for legal cases
Fill in the blank(s) with correct word
As a botanist working for a field museum, you spend many hours in the field looking for new species of plant. On a recent trip, you came across a group of plants that may represent a new species. Each plant has seeds but they are not encased in fruit. Additionally, you notice that male and female cone structures are found on different plants. The cones are very large, and you determine average weight to be 30 kg. In which of the following groups would this plant most likely be classified?
A. cycad B. fern C. gnetophyte D. angiosperm E. conifer
Vampire squid (Vampyroteuthisinfernalis) are deep-sea cephalopods with features similar to both octopus and squid. Extensive video recordings show the diet of the vampire squid consists of items like crustacean remains and fecal pellets. Which of the following terms describes the position of the vampire squid in the deep-sea trophic pyramid?
A. secondary carnivore B. primary producer C. detritivore D. herbivore E. primary carnivore
You conduct a study to determine how the amount of time spent studying affects students' performance on exams, and you want display the data you have collected using a line graph. What is the dependent variable, and on which axis should it be represented in your graph?
A) The dependent variable is "time spent studying," and it should be represented on the x-axis. B) The dependent variable is "time spent studying," and it should be represented on the y-axis. C) The dependent variable is "performance on exams," and it should be represented on the x-axis. D) The dependent variable is "performance on exams," and it should be represented on the y-axis. E) The dependent variable is "time spent studying," and it can be represented on either the x- or y-axis