Martin keeps a worm bin in his basement because they need cooler temperatures to survive. He feeds them about 1 pound of kitchen scraps each week. One summer the temperatures rose above the optimal temperature for the red worms (~ 85°F) and many in his colony died. However, those that survive continued to reproduce and within 6 months his colony was again thriving. The next summer, unusually warm temperatures again cause the basement temperatures to rise above 85°F for 2 days in a row. Surprisingly, Martin noticed that only a small portion of the worm colony died. What is the best explanation for this?
What will be an ideal response?
The worms surviving the first year had a higher heat tolerance and passed this trait to their offspring.
You might also like to view...
The function of BMP4 is to ____________ while the function of gremlin is to __________ BMP4.
A. cause apoptosis (cell death); inhibit. B. cause mitosis; enhance production of. C. inhibit growth; enhance. D. enhance growth; enhance. E. cause apoptosis (cell death); enhance.
The onset of AIDS is often accompanied by
A. a steep drop in T cell numbers. B. macrophage infection. C. a positive HIV test. D. lung infections and other opportunistic infections. E. Kaposi's sarcoma.
Which of the following must an organism do in order to be living?
a. grow and reproduce b. photosynthesis c. cellular respiration d. meiosis
The eastern meadowlark and the western meadowlark are two bird species that look very similar to each other. Why do biologists not consider them the same species?
A. The two species experience the reproductive barrier of habitat isolation. B. Species are not determined by appearance but by their ability to interbreed naturally. C. The two species do not live in the same habitat and thus do not interbreed in nature. D. All of the above are correct.