________ is the performance of an action that benefits another individual at a cost to the actor.
Fill in the blank(s) with the appropriate word(s).
Altruism
Altruism is the performance of an action that benefits another individual at a cost to the actor.
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The following question(s) relate to the data table below, showing typical fluctuating pH and dissolved oxygen levels in a fish pond with a heavy concentration of algae over a 24-hour period.TimeOxygen (ppm)pH2 a.m.4.57.74 a.m.2.87.26 a.m.2.26.88 a.m.2.56.810 a.m.3.97.2Noon6.57.72 p.m.10.08.34 p.m.12.18.86 p.m.13.19.28 p.m.13.09.210 p.m.12.08.8Midnight10.88.3What is a possible reason for oxygen to be so low by the end of the night?
A. Fish consume oxygen during the night, and oxygen starts to run out by dawn; algae are not linked to the low oxygen. B. Algae produce oxygen as a by-product of photosynthesis during the day, but not at night, so oxygen runs out by the end of the night; in addition, fish continue to consume oxygen during the night, which further reduces the oxygen by the end of the night. C. Algae produce oxygen as a by-product of photosynthesis during the day, and not at night, so oxygen runs out by the end of the night; fish are not linked to the low oxygen. D. Neither fish nor algae or linked to the low oxygen found at the end of the night.
Most cnidarians are known to produce toxins. In fact, it has been claimed that one particular species produces the most deadly of all toxins on the planet. What feature of this group most likely evolved simultaneously with the evolution of these toxins?
A) the medusa body form B) asexual reproduction C) a slow-moving or sessile lifestyle in the adult D) diploblastic design E) bilateral symmetry in the mobile larval forms
Which of the following concepts explains why the wings of a chicken and a robin are different?
a. homologous structure b. analogous structure c. modern synthesis d. microevolution
An extreme case of Rh disease is known as
a. hemolytic disease of the newborn. b. Down syndrome. c. Tay-Sachs disease. d. sickle cell anemia. e. polycythemia.