Members of the domains Bacteria and Archaea are called ________ because they lack a nucleus and internal compartments
A) protists B) prokaryotes C) molds D) eukaryotes
Answer: B
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According to the latest data, the global human population is predicted to
A) continue to increase exponentially for the next 50 years. B) peak at 10 billion. C) decline precipitously to 1 billion. D) increase at a steady rate for the next 50 years.
The type of system depicted in the accompanying figure:a
can be found in arthropods. b. can be found in cephalopods. c. can be found in annelids. d. has hemoglobin as the oxygen transporting pigment. e. can be found in arthropods and annelids.
In many parts of the Everglades in Florida, excessive irrigation is lowering water levels and allowing salt water to enter the normally freshwater swamps. Why is this a problem for plants that have adapted to life in these swamps?
A. The salt competes with minerals for uptake by the plants, limiting their growth. B. Salts bind to nitrogen, preventing it from being taken up. C. The plants cannot move sugars down the xylem if there is salt outside of the roots pulling water out. D. Photosynthesis is inhibited by salt. E. The plant roots cannot take up water if the soil salt concentration is high.
Which of the following best describes IgM antibodies?
A) They cause basophils and eosinophils to degranulate. B) They are the most common type of antibody in the blood during the initial phases of an immune response. C) They are the antibody class found in body secretions. D) They interact with phagocytes and NK cells. E) They can cross the placenta to provide passive immunity.