What is the independent variable in this figure?
A. number of children with allergies to dust mites
B. amount of interleukin-10 produced
C. number of white blood cells in the children's blood
D. amount of antibodies in the children's blood
E. if children were infected with flatworms
E. if children were infected with flatworms
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Which of the following is a function of an exoskeleton?
A. Exoskeletons provide protection. B. Exoskeletons help reduce water loss in terrestrial species. C. Exoskeletons provide support. D. Exoskeletons provide a site for muscle attachment. E. All of the answer options are correct.
What is TRUE about the settlers of Easter Island?
a. The settlers traveled 2000 km across the ocean to arrive there. b. The population of the island peaked at 100,000 people. c. People were already living there when the settlers from Polynesia arrived. d. The island had been settled repeatedly over the years, but nobody stayed until the 1700s.
Where on this phylogenetic tree of primate evolution do you find evolution of the hominids?
A. No. 1 B. No. 2 C. No. 3 D. No. 4 E. No. 5
In order for signal transduction to work properly in plants, the
A. relay proteins need to amplify the signal and convert it into one that will alter the cellular machinery. B. correct hormone needs to bind to the appropriate receptor in order to enter the cell. C. gene expression must change to produce the appropriate cellular process. D. All of the answer choices are correct.