Sterol-like molecules called hopanoids are thought to be important for the structural integrity of many bacteria because of their suspected role in membrane stabilization.
Answer the following statement true (T) or false (F)
True
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Which of the following is likely to be true, based on the following cladogram?
1.Amphibians and lungfishes are sister groups.
2.Amphibians and amniotes both have four limbs and a swim bladder or lungs.
3.Amphibians and lungfishes both have four limbs and a swim bladder or lungs.
4.All of the groups listed have a backbone and a skull.
Of the following four islands at the same
latitude, the one possessing the fewest species is a. 1,000 square kilometers in area and 300 km from the mainland. b. 3,000 square kilometers in area and 100 km from the mainland. c. 100 square kilometers in area and 3,000 km from the mainland. d. 300 square kilometers in area and 1,000 km from the mainland. e. none of these
Thrombin acts on which protein?
a. fibrin b. plasmin c. fibrinogen d. plasminogen e. factor X
All of the following would be required for a positive fluorescent antibody (FA) test for syphilis except
A. Complement from a guinea pig B. Syphilis spirochetes in a patient sample scraped from a lesion C. Anti-Treponema antibodies D. Fluroescein-labeled antiglobulin antibodies E. A microscopic slide