Hans Suess' work (or subsequent studies carried out by other researchers) determined that the amount of 13C in the Earth's atmosphere has ____________, and the amount of 14C in the atmosphere has ____________
A. decreased; increased
B. increased; decreased
C. decreased; also decreased
D. increased; also increased
C
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Four of the five answers listed below are targets of the immune system. Select the exception
a. virus b. normal cells c. cancer cells d. bacteria e. debris and dead cells
Four of the five answers listed below provide evidence that genes are located on chromosomes. Select
the exception. a. the chromosome number is cut in half by meiosis b. original chromosome number is restored by fertilization c. some genes tend to be inherited together d. environmental factors may influence gene expression e. there are two sets of chromosomes, one maternal and one paternal in diploid forms
Four of the five answers listed below are life processes that are characteristic of a normal life. Select
the exception. a. reproduction b. energy usage c. mutation d. respiration e. homeostasis
The Lotka-Volterra model of predator-prey interactions assumes a mutual regulation of predator and prey populations
Indicate whether the statement is true or false