©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
Bio 160 Exam 4 Questions and Answers
100% Pass
24. If you brush your fingers along the tentacles of a sea anemone, which of the following are
you most likely to find upon microscopic examination of your fingers?
A) teeth marks
B) spines
C) spicules
D) nematocysts - ANS D
26. Which one of these mollusc groups is classified as suspension (i.e., filter) feeders?
A) bivalves
B) gastropods
C) sponges
D) cephalopods - ANS A
27. Why do large animals need specialized organs for gas exchange?
A) they require more oxygen per unit of volume
B) surface area increases more rapidly than volume as size increases
C) volume increases more rapidly than surface area as size increases
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
D) they collect more energy and therefore have more energy to allocate to specialized tissues -
ANS C
45. Which of the following analyses would best help to determine if a fossil skeleton represents
a reptile or a mammal?
A) look for the presence of milk-producing glands
B) look for the mammalian characteristics of a four-chambered heart and a diaphragm
C) use molecular analysis to look for the protein keratin
D) examine the teeth and lower jaw: a mammalÕs teeth will be differentiated and the lower
jaw be composed of a single bone - ANS D
11. Which of the following characteristics is unique to animals?
A) the structural carbohydrate, chitin
B) nervous system signal conduction
C) heterotrophy
D) flagellated gametes - ANS B
22. Which of the following is true of acoelomates?
A) They lack a fluid-filled body cavity (coelem)
B) They lack a layer of mesoderm surrounding their endoderm
C) They lack a layer of ectoderm surrounding their mesoderm
D) They lack a layer of endoderm surrounding their mesoderm - ANS A
34. Which of the following is a characteristic of all chordates at some point during their life
cycle?
2
Bio 160 Exam 4 Questions and Answers
100% Pass
24. If you brush your fingers along the tentacles of a sea anemone, which of the following are
you most likely to find upon microscopic examination of your fingers?
A) teeth marks
B) spines
C) spicules
D) nematocysts - ANS D
26. Which one of these mollusc groups is classified as suspension (i.e., filter) feeders?
A) bivalves
B) gastropods
C) sponges
D) cephalopods - ANS A
27. Why do large animals need specialized organs for gas exchange?
A) they require more oxygen per unit of volume
B) surface area increases more rapidly than volume as size increases
C) volume increases more rapidly than surface area as size increases
1
, ©JASONMcCONNELL 2025 ALL RIGHTS RESERVED
D) they collect more energy and therefore have more energy to allocate to specialized tissues -
ANS C
45. Which of the following analyses would best help to determine if a fossil skeleton represents
a reptile or a mammal?
A) look for the presence of milk-producing glands
B) look for the mammalian characteristics of a four-chambered heart and a diaphragm
C) use molecular analysis to look for the protein keratin
D) examine the teeth and lower jaw: a mammalÕs teeth will be differentiated and the lower
jaw be composed of a single bone - ANS D
11. Which of the following characteristics is unique to animals?
A) the structural carbohydrate, chitin
B) nervous system signal conduction
C) heterotrophy
D) flagellated gametes - ANS B
22. Which of the following is true of acoelomates?
A) They lack a fluid-filled body cavity (coelem)
B) They lack a layer of mesoderm surrounding their endoderm
C) They lack a layer of ectoderm surrounding their mesoderm
D) They lack a layer of endoderm surrounding their mesoderm - ANS A
34. Which of the following is a characteristic of all chordates at some point during their life
cycle?
2
