Which components of blood are the smallest in size?
a. erythrocytes
b. leukocytes
c. platelets
d. erythrocytes and platelets are the same size
e. erythrocytes, leukocytes and platelets are the same size
C
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Microspore mother cells produce microspores. What do microspores then develop into?
A. egg cells B. pollen grains C. synergids D. endosperm E. megaspores
When exposed to water, sodium chloride (NaCl) ____
a. dissolves into Na+ and Cl- ions b. crystallizes into a solid c. dissolves into Na- and Cl+ ions d. crystallizes into a liquid e. forms a hydrophobic compound
What does each different band on a DNA profile represent?
A small island has stable populations of plants and animals, including one species of hawk but no other large predators. A ship docks at the island, and the ship's cat escapes. If the cat was pregnant, what do you think the sailors are likely to find if they return ten years later?
A. The bird and lizard species on the island will have many new adaptations. B. The island will have similar flora and fauna, with the addition of a cat population. C. Some species of ground-nesting birds may have gone extinct. D. Species that were formerly preyed upon by hawks will benefit. E. The increase in nitrogenous waste from the cats will increase plant productivity.