A Closed Circulatory System Is Present in ____

Q43: The presence of earthworms _.<br>A)increases free nitrogen

Q44: Arthropod success cannot be attributed to which

Q45: A major explosion of animal diversity in

Q46: The smallest adult chelicerates are _.<br>A)horseshoe crabs<br>B)mites<br>C)scorpions<br>D)spiders<br>E)ticks

Q47: Match the description to the correct mollusk

Q49: Each tapeworm proglottid contains _.<br>A)sperm only<br>B)fertilized eggs

Q50: A flatworm moves nutrients and gases through

Q51: The mollusks with the largest brain and

Q52: A gastrovascular cavity is present in _.<br>A)flatworms

Q53: A mantle is found only among the