Recent theories on the biological need for IgE as an:
A. Apoptosis causing agent
B. Antiviral agent
C. Antibacterial agent
D. Antifungal agent
E. Anti-helminthic
Ans: E. Anti-helminthic
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Fungi
A. are prokaryotes or eukaryotes, depending on the species. B. produce chlorophyll under aerobic conditions. C. produce chlorophyll under aerobic conditions and are prokaryotes or eukaryotes, depending on the species. D. are eukaryotic organisms.
Energy enters most ecosystems by the process of
A. biosynthesis. B. respiration. C. biogeochemical weathering. D. photosynthesis. E. fermentation.
Which of the following statements does not describe the leaf epidermis?
a. The cells all contain chloroplasts and photosynthesize. b. Some of the cells are modified to form trichomes. c. The cells are covered by a waxy cuticle. d. The cells are relatively transparent. e. It contains stomata, each of which is flanked by two guard cells.
The text indicates that the digestive tract in vertebrates is ventral to (beneath) the backbone. Yet our digestive tract is in front of our backbone, which is still considered ventral. Why is this an appropriate statement?
A) Terms like ventral that describe spatial relationships between structures are based on a common body plan of a creature who walks on four legs and in that case the digestive track would be ventral to the backbone. B) Humans have entirely different organ arrangements than any other vertebrates so words like ventral take on entirely different meanings. C) It is wrong to say that our digestive track is ventral to the backbone.