Exam (elaborations)
BIOLOGY 109 Q&A
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Exam of 7 pages for the course Biology 109 at Biology 109 (BIOLOGY 109 Q&A)
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BIOLOGY 109 Q&ADr. B finds that if he removes one cell at the four-cell stage from a particular embryo
the cells develop into a complete organism. The organism must be a
A. echinoderm
B. arthropod
C. mollusc
D. cnidarian
E. annelid - ANSWER-A. echinoderm
Sequence in which animal clades originated (earliest to latest)
1. radiata
2. coelomates
3. deuterostomia
4. parazoa
5. bilateria - ANSWER-4, 1, 5, 2, 3
Radial symmetry is usually associated with
A. protosome development
B. presence/absence of true tissue
C. sessile existence
D. presence of a coelom
E. lifestyle involving active movement - ANSWER-C. sessile existance
All can be observed in the phlyum Annelida EXCEPT
A. a gastrovascular cavity with a single opening
B. a well developed coelom
C. a ventral nerve chord
D. a closed circulatory system
E. segmentation - ANSWER-A. a gastrovascular cavity with a single opening
Jointed appendages, hard exoskeleton, four pairs of walking legs on its
cephalothorax, no antennae.
A. chelicerae
B. wings
C. closed circulatory system
D. parapodia
E. a water vascular system - ANSWER-A. chelicerae
Large marine invertebrate, neither segmented nor jointed appendages, but there is a
large well developed eye, has no shell
A. Mollusca
B. Arthropoda
C. Annelida
D. Nematoda
E. Rotifera - ANSWER-A. Mollusca
Radial symmetry, poorly-developed nervous system with no brain, no circulatory or
water vascular system.
, A. Proboscis
B. Lophophore
C. Spongocoel
D. Cnidocytes
E. Mantle - ANSWER-D. Cnidocytes
Which is incorect pairing?
A. Platyhelminthes-flatworms, acoelomates
B. Cnidaria-radial, dipoblastic
C. Nematoda-round worms, pseudocoelomate
D. Mollusca-closed circul system, lophophore
E. Echinodermata- water vascular system, deutrostome - ANSWER-D. Mollusca-
closed cirulatory system, lophophore
Pseudocoelomates are characterized by
A. a solid body without a cavity surrounding internal organs
B. deuterostome development
C. a coelom that is not completely lined with mesoderm
D. adaptation to terrestrial environments - ANSWER-C. a coelom that is not
completely lined with mesoderm
Which is true about flatworms?
A. they have a fluid-filled body cavity called a coelom
B. they are the simplest animals to have three embryonic germ layers
C. they are pseudocoelomates
D. they are radially symetrical - ANSWER-B. they are the simplest animals to have
three embryonic germ layers
Bilateral symmetry, hard exoskeleton, 2 or 3 body segments, three pairs of walking
legs and one pair of intennae - ANSWER-Insects
Multicellular, heterotrophic eukaryotes whose cells do not have cell walls -
ANSWER-Animal
Tiny colonial animals with a hard exoskeleton and a lophophore - ANSWER-
Ectoprocts (bryozoa)
Bilateral symmetry, exoskeleton, two body segments, four pairs of walking legs with
chelicerae. - ANSWER-Arachnida
Which of the following would not be present in both fungi and plants?
A. cell wall
B. ribosomes
C. chloroplasts
D. nucleaus
E. all of the above - ANSWER-C. chloroplasts
Which about fungi is TRUE?
A. all fungi are autotrophs
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