What organisms did the ancestors of eukaryotes form a symbiotic relationship with allowing for the adaptation to an oxygen rich atmosphere?
a. Prokaryotes.
b. Bacteria.
c. Amoeba.
d. Mitochondria.
D
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Fallon is on her way to work when she sees a little boy, who is crying and apparently lost. Seeing the crying boy makes Fallon very uncomfortable and upset. To reduce these negative feelings, Fallon stops to help the boy find his parents. Which theory best explains Fallon's helping behavior?
A. Arousal: cost-reward B. Empathy-altruism C. Evolutionary D. Environmental
Which of the following is true about mathematical ability?
a. Girls outperform boys from an early age. b. There are no gender differences in terms of mathematical ability. c. Boys outperform girls from an early age. d. none of these
Wiona is in late adulthood and was diagnosed with a disease in which she is susceptible to major bone breakage if she falls. Wiona most likely has which of the following diseases?
a. osteoporosis b. jaundice c. macular degeneration d. arthritis
Menstruation is a natural characteristic of female mammals
a. True b. False