The __________ reactions convert _____ (B) to sugars
a. Calvin cycle; O2
b. light; CO2
c. Calvin cycle; CO2
d. light; O2
C
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A paleontologist is studying a group of fossils from its first appearance in the fossil record to its extinction. She determines that the group descends from a single common ancestor and gave rise to no new species
Its appearance is distinct from any other group of fossils. Based on this information, she decides that it is a new species. In coming to this decision, which species concept or concepts is she using? Select all correct choices A. biological species concept B. morphospecies concept C. evolutionary species concept D. ecological species concept E. none of these
If a given protein’s level peaks early in G1, but is absent before the G2 transition, what can be inferred about its possible role in regulating the cell cycle?
a. This protein inhibits Cdk1. b. This protein activates Cdk1. c. This protein inhibits Cdk2. d. This protein activates Cdk2. e. This proteins is involved in DNA synthesis.
Viruses exhibit all the following except ________.
A. genes B. ultramicroscopic size C. definite shape D. metabolism E. ability to infect host cells
Which of the following is not a secondary
sexual trait? a. rounded hips in females. b. deep voice in males. c. facial hair in males. d. rounded breasts in female. e. testes in males