Which of the following represents an activity
within a population?
a. a fox consuming a rabbit
b. the absorption of nitrogen by bacteria and
converting it to a form useful to plants
c. a peacock spreading and shaking his
feathers to attract a female
d. moss growing on the north side of a large
pine tree
e. a virus causing rabies in a dog
C
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Why are both blood and bone considered connective tissue?
What will be an ideal response?
Which bone is the major load-bearing bone of the lower leg?
a. tibia b. fibula c. femur d. patella e. pelvic girdle
The graph above depicts the relative increase in autism in children from 1997 to 2007 living in California. In 2001, the additive thimerosal was removed from most childhood vaccines
Based on the information presented in the graph, what can be concluded about the hypothesis that thimerosal causes autism? A) Thimerosal, at the very least, contributes to the occurrence of autism as evidenced by the almost logarithmic increase in children with autism from 2001 to 2007. B) Prior to 2001, thimerosal clearly influenced the cases of autism in California. C) A sharp decrease in the cases of autism would be expected after 2001 if thimerosal was the causative agent of autism. D) The results of the study are inclusive. E) Thimerosal requires some other agent to help induce autism.
Select the choices that are characteristics of hormones.
A. travel in the bloodstream B. affect metabolism of cells with receptors to them C. are secreted by exocrine glands D. can act at a distance between body parts