If a field contains approximately 1,000 kilocalories of energy in grass, which is eaten by crickets, which are eaten by birds, then approximately how many kilocalories of energy could be in the birds that live in this field?
A) 90 B) 1,000 C) 10 D) 100 E) 900
C
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The 140 kbp genome containing many short repeats, ribosomal RNA genes, one RNA polymerase gene (rpo) and one RubisCO gene (rbcL) is most likely from a(n)
A) plant. B) autotrophic bacterium. C) chloroplast. D) autotrophic archaeon.
It is now possible to analyze the genetics of the new
generation by a. fetoscopy. b. amniocentesis. c. chorionic villi sampling. d. pre-implantation diagnosis. e. all of these.
Which of the following statements is false about
pioneer species? a. They have wide ranges of tolerance. b. Many partner with nitrogen-fixing bacteria. c. They remain permanent residents of the community. d. They include lichens and plants with short life cycles. e. They are often small annuals with wind dispersed seeds.
There are numerous fish genera that have individuals that can change their sex during their lifetime. What is this called?
A. sequential parthenogenesis B. sequential sex determination C. sequential production of gametes D. sequential fertilization E. sequential hermaphroditism