The ________ have silicate shells and thin pseudopods
A) Amebozoa
B) Euglenids
C) Ciliates
D) Dinoflagellates
E) Radiolaria
E
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Based on the species-area plot in the figure above, if habitable area on an island were reduced from 10,000 km2 (square kilometers) to 1000 km2, roughly what percentage of the species would disappear?
A) 0.3 percent B) 3 percent C) 30 percent D) 60 percent
In humans, the stem cells from which all blood cells arise are found in the
A. peripheral circulation. B. lymphatic vessels. C. lymph nodes. D. bone marrow.
A bacterial gene regulatory system is likely to have (select all that apply)A) a coding sequence.B) an operator.C) one or more introns.D) a motor.E) a ribosome recognition site.
What will be an ideal response?
ATP carries energy in the form of high-energy
A. lipid bonds. B. hydrogen bonds. C. carbohydrate bonds. D. peptide bonds. E. phosphate bonds.