22. Water movement through a sponge would follow what path?

(A) choanocyte→ mesohyl →spongocoel

(B) porocyte→ spongocoel→ osculum

(C) colloblast →coelom→ porocyte

(D) porocyte→choanocyte→mesohyl

(E) blastopore→gastrovascular cavity→protostome

23. Which of the following is not true of the chelicerates?(A) They have antennae.(B) Their anterior appendages are modified as pincers or fangs.(C) The horseshoe crab is one surviving marine member.(D) They include ticks, scorpions, and spiders.(E) Their body is divided into a cephalothorax and an abdomen.

24. Which of the following characteristics is probably most responsible for the incredible diversification of insects on land?(A) segmentation(B) flight(C) exoskeleton(D) tracheal system(E) metamorphosis

25. Some 530-million-year-old Chinese fossils resemble lancelets but have a more elaborate brain and a brain case (cranium). These fossils may represent(A) an early vertebrate.(B) a non-tetrapod gnathostome.(C) a primitive bony fish.(D) a "missing link" between the urochordates and cephalochordates.(E) the first chordate.

26. If you were to observe a monkey in a zoo, which characteristic would indicate a New World origin for that monkey species?(A) occasional bipedal walking(B) eyes close together on the front of the skull(C) distinct "seat pads"(D) downward orientation of the nostrils(E) use of the tail to hang from a tree limb

27. Unlike eutherian (placental) mammals, both monotremes and marsupials(A) have some embryonic development outside the mother's uterus.(B) are found in Australia and Africa.(C) lay eggs.(D) lack nipples.(E) include only insectivores and herbivores.

28. Which of the following is not part of an older tree's bark?(A) lenticels(B) secondary xylem(C) cork cambium(D) secondary phloem(E) cork

29. Which of the following cell types is least likely to have a secondary wall?(A) tracheid(B) sclerenchyma cell(C) fiber cell(D) sclereid(E) parenchyma cell

30. Based on the hypothesis presented in Figures 21.20 and 35.36 in your textbook, predict the floral morphology of a mutant lacking activity of the B genes.(A) sepal-carpel-carpel-sepal(B) sepal-sepal-carpel-carpel(C) petal-petal-petal-petal(D) carpel-petal-petal-carpel(E) carpel-carpel-carpel-carpel

31. Which of the following does not appear to involve active transport across membranes?(A) the movement of sugar from mesophyll cells into sieve-tube members in corn(B) the movement of mineral nutrients into cells of the root cortex(C) K+ uptake by guard cells during stomatal opening(D) the movement of mineral nutrients from the apoplast to the symplast(E) the movement of sugar from one sieve-tube member to the next

32. Imagine cutting a live twig from a tree and examining the cut surface of the twig with a magnifying glass. You locate the vascular tissue and observe a growing droplet of fluid exuding from the cut surface. This fluid is probably(A) cell sap from the broken vacuoles of cells.(B) phloem sap.(C) xylem sap.(D) fluid of the transpiration stream.(E) guttation fluid.

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