The lac operon is usually in the _____ position and is activated by a/an _____ molecule.
A) on, repressor
B) on, inducer
C) off, repressor
D) off, inducer
Ans: D) off, inducer
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Both gymnosperms and angiosperms form seeds, which can travel over long distances (either via wind or water). Which of the following are benefits of seed production and dispersal? Select all correct choices
A. Seeds can introduce offspring into environments with ample light. B. Seeds can introduce offspring into pathogen-free environments. C. Seeds can introduce offspring into nutrient -rich environments.
The two continents that suggested continental drift are called:
a. North and South America. b. North America and Europe. c. South America and Africa. d. Europe and Asia. e. Australia and India.
A friend is writing one of those “Animals Attack!” style movies, and needs your help choosing a species to fill the title role. The plot, to the extent that it can be called a plot, requires an organism that feasts on other animals with hard shells, and can sustain massive injuries only to come back stronger and in greater numbers. What species do you recommend?
a. bees b. turtles c. sea stars d. hydras
To determine your body mass index (BMI), you look at the relationship between ________
A) your age and height B) your age and weight C) your height and weight D) your weight and gender