Which of the following species has become a pest after its introduction elsewhere from North America?
A) chestnut blight
B) honeybee mite
C) zebra mussel
D) comb jelly
Ans: D) comb jelly
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What is characteristic of adult frogs?
a. gills b. sucking air into their lungs c. countercurrent exchange d. pushing air into their lungs e. drawing water by inhalation across their gills
Which phase of cell division is depicted in the accompanying figure?
a. prophase of mitosis b. metaphase of mitosis c. prophase I of meiosis d. prophase II of meiosis e. metaphase I of meiosis
Hormones secreted by endocrine glands belong to all the following chemical categories except
A. glycoproteins. B. steroids. C. polypeptides. D. amines. E. carbohydrates.
You have been given vials of H2, Na, H2O, Hg, and CH4. What are the majority of your vials filled with?
A. molecules B. carboxyls C. gases D. liquids at room temperature