An ecologist catches 100 frogs from a pond, marks them, and releases them back into the pond. After a few days, another 100 frogs are captured and 10 have the marks on them. How many frogs are in the pond?
A. 900
B. 100
C. 1,000
D. 90
E. 10,000
C. 1,000
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The gastrovascular cavity of a flatworm serves as both the ____ and ____ systems of the body
a. digestive; circulatory b. digestive; reproductive c. digestive; respiratory d. circulatory; respiratory e. respiratory; reproductive
Which statement is TRUE?
a. The laws of thermodynamics do not apply to living organisms. b. Producers in ecosystems have the highest concentrations of energy. c. The energy available to do cellular work will exist forever. d. The amount of energy available to consumers is more than that available to producers. e. When plants trap energy, they convert it into light.
Which of the following statements is not correctly matched with the given scientific method term?
A. Bethany watched butterflies feeding in a large field of wild flowers. She noticed that more butterflies approached the yellow and purple flowers than the red flowers. (Observation) B. All organisms are comprised of cells. (Data collection) C. Leslie set up mist nets to catch bats flying over a small stream. Each bat that was caught was weighed and sexed. (Experimental design) D. A researcher reported that red-foot tortoises preferred red-colored fruits and vegetables to those that were green or white. (Conclusion) E. Biologists suggested that 2-3 cups of coffee per day can decrease death rates among women. (Hypothesis)
A microorganism that is not motile and has stopped metabolizing could be considered dead.
Answer the following statement true (T) or false (F)