The solar system began as a rotating cloud of Stardust
a. true
b. false
Answer: a. true
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Apical-basal patterning genes are expressed in
A. the basal region. B. the apical region. C. the central region. D. the apical, basal, and central regions. E. the apical and basal regions only.
Identify the primary role of the lymphatic system.
A. To produce and store large numbers of white blood cells B. To distribute hormones around the body C. To deliver oxygen to the deep muscle cells D. To filter out cellular wastes from the blood
A type of molecule that helps certain enzymes function is a(n)
A. deactivator. B. antibiotic. C. vitamin. D. All of these answers are true.
Which of the following statements is NOT true about the flatworms?
a) Liver flukes and blood flukes are parasites in humans only. b) Schistosomiasis is a common human blood disease caused by flukes in tropical areas. c) Tapeworms are hermaphroditic, having both male and female reproductive structures in each proglottid. d) Planaria contain pigmented, photosensitive eyespots. e) tapeworms have a ladder-type nervous system similar to other flatworms.