The majority of white blood cells in circulation include
A) neutrophils and lymphocytes.
B) eosinophils and basophils.
C) macrophages.
D) erythrocytes.
Ans: A) neutrophils and lymphocytes.
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Which of the following would be found in Bowman's space? (Select all correct choices.)
A. water B. glucose C. wastes D. solutes from the blood E. large proteins
What are some of the dangers associated with the use of organophosphate pesticides that might be of concern for humans? (Organophosphates inhibit acetylcholinesterase.) What are some ethical concerns related to their use?
What will be an ideal response?
Which of the following occurs during gastrulation?
a. formation of the gray crescent region b. formation of ectoderm, mesoderm, and endoderm c. closure of the archenteron d. formation of the blastocoel e. radial cleavage takes place
Which of the following statements is true?
A) The process of respiration is critical for maintaining the freshwater pools on Earth's surface. B) Transpiration moves saltwater to the atmosphere and then to freshwater pools on Earth's surface. C) About 2.5 percent of Earth's water is fresh at any given time. D) Glaciers make up about 20 percent of Earth's freshwater pool. E) An aquifer is a pool of freshwater perched over the base groundwater that is accessible by humans.