What does the blue graph line represent?
a. breeding pairs per 100 acres
b. species density
c. ecological age
d. number of species
Answer: d. number of species
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The natural philosophy of Aristotle and his colleagues was
a. mechanistic. b. vitalistic. c. a belief in absolute truth. d. a and c.
Which members of an ecosystem occupy the first trophic level of a food web?
A. Autotrophs B. Herbivores C. Omnivores D. Carnivores
Classification.You will need a genetic code table to answer the following. The following statements refer to the five RNA codons listed below; match them appropriately:
A. This codon codes for an amino acid and indicates the beginning of a coding region. B. This codon terminates a coding region. C. A DNA codon of ATT is complementary to this RNA codon. D. The anticodon AAA pairs with this codon. E. F. A single mutation involving the second letter of codon AUA could convert it to this codon.
________ cancer is the second-leading cause of cancer deaths, but early detection by using a long, flexible fiber tube to screen for precancerous polyps can save many lives
Fill in the blank(s) with correct word