Natural selection involves energetic trade-offs between _____
A) choosing how many offspring to produce over the course of a lifetime and how long to live
B) producing large numbers of gametes when employing internal fertilization versus fewer numbers of gametes when employing external fertilization
C) the emigration of individuals when they are no longer reproductively capable or committing suicide
D) increasing the number of individuals produced during each reproductive episode and a corresponding decrease in parental care
E) high survival rates of offspring and the cost of parental care
Answer: E
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Use the following study to answer the following question(s): A current trend among professional baseball players is to wear braided titanium necklaces. The titanium reportedly regulates the flow of energy through the body. The player wearing the necklace then shows improved strength, tires less, and recovers more quickly.Which of the following would be the strongest evidence for or against the necklace's effectiveness?
A. A bar graph illustrating the satisfaction levels of the players who wear the necklace B. A bar graph comparing batting averages of the players who wear the official titanium necklace and those who were unknowingly wearing a fake titanium necklace C. A bar graph comparing the percentage of players who wear the necklace with the percentage of players who do not wear the necklace D. A scatter plot showing days on the disabled list and percentage of players who do or do not wear the necklace
In which type of vessel do the walls contain a high proportion of smooth muscle?
a. lymphatic vessels b. arterioles c. capillaries d. venules e. veins
________ play a pivotal role in programmed cell death
A) Cyclins B) Telomeres C) Proto-oncogenes D) Oncogenes E) Telomerases
No matter how much water a human drinks, the kidneys are always regulating various aspects of the blood, including ________.IThe pH of the bloodIIThe plasma concentration of iron ionsIIIThe plasma concentration of sodium ionsIVThe plasma concentration of potassium ionsVThe temperature of the blood
A. I, II, III, and IV B. I, II, III, IV, and V C. I, II, and III D. I, III, IV, and V E. I, III, and IV