Skagit Valley College Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
ENVC-123 Winter 2025
ENVC-123 (Environmental Science) Comprehensive Questions & Verified
Answers | 100% Correct -The Ultimate Guide for Yr. (2026/2027)
Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
Name _______
True or False (Your answer selections here go on a Scantron Sheet) (Note: A=True, B=False) 1.
True or False: All fish have scales.
2. True or False: A “surface orientated” fish that feeds from the surface would likely have a superior
mouth.
3. True or False: Teeth in many Chondrichthyes are modified scales.
4. True or False: A fish that is heterozygotic (for a trait) has two different alleles for the trait.
5. True or False: The high diversity if fish is due in large part to the number and isolation of different
fresh water locations.
6. True or False: All fish are ectothermic.
7. True or False: Marine fish have larger swim bladders
8. True or False: Fish breathing is unidirectional.
9. True or False: There is more than one type of Leukocyte.
10. True or False: Most fish are ectothermic
Multiple Choice (Your answer selections here go on a Scantron Sheet)
11. Which one of the following major evolutionary fish groups would be/is most prevalent in the fossil
record?
a. Chondricthyes
b. Osteichthyes
c. Conodonts
d. Ostracoderms.
12. Which of the following most correctly represents the percentage distribution of fish between fresh
and marine waters
a. 58% marine, 41% fresh b. 50% marine, 50% fresh
c. 58% fresh, 41% marine
PALMER 1/31/2025
,Skagit Valley College Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
ENVC-123 Winter 2025
d. 80% marine, 20% fresh
e. 80% fresh, 20% marine
13. Which of the following correctly reflects the three necessary steps of speciation (in correct order):
a. Gene pool isolation, reproductive isolation, change in gene pool.
b. Reproductive isolation, change in gene pool, gene pool isolation
c. Change in gene pool, reproductive isolation, gene pool isolation
d. Gene pool isolation, change in gene pool, reproductive isolation.
14. The dorsal and anal fins of a fish with the “lie in wait” body form would be located ______________
on their body.
a. farther apart
b. farther
back
c. farther forward
d. central
15. Which of the following correctly represents the percentage (%) of marine fish species distribution
near land?
78
a.
b. 68
c. 58
d. 88
e. 37
16. Which of the following characteristics of water has the greatest effect on fish distribution:
Low light transmission
a.
b. Low compressibility
c. Universal solvent
d. Density
17. Darwin explained in his book how natural selection could result in __________. a. Evolution
b. Isolation
c. Migration
d. Maturation
e. Revelation
PALMER 1/31/2025
, Skagit Valley College Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
ENVC-123 Winter 2025
18. In the binomial nomenclature system __________ is used to ensure no change in the meaning of an
organisms name.
a. Greek
b. English
c. French
d. Latin
e. Spanish
19. Which of the following taxonomic terms specifies a particular organism? a. genus
b. species
c. class
d. family
20. A trait on a fish, used for classifying or keying, that can be counted is a _____________ trait. a.
meristic
b. morphometric
c. metered
d. primary
e. karyotype
21. Which of the following scale types would not be found on “bony fish”? a. elasmoid
b. placoid
c. scutes
d. cycloid
e. ctenoid
22. Which of the following lists shows the classification levels in order from broadest (most inclusive)
grouping to narrowest (least inclusive) grouping
A) Family, Class, Phylum, Kingdom Domain, Genus, Order, Species.
B) Genus, Family, Class, Phylum, Kingdom, Domain, Order, Species. C) Domain,
Kingdom, Family, Class, Phylum, Genus, Order, Species.
D) Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
E) Genus, Order, Species, Family, Class, Phylum, Kingdom, Domain.
23. Within the study of phylogenetic systematics a group of different species in which every member
(different species or groups) can be connected back to a single common ancestor is considered a
_____________ group:
a. monophyletic
b. paraphyletic
c. polyphyletic
d. multiphyletic
PALMER 1/31/2025
ENVC-123 Winter 2025
ENVC-123 (Environmental Science) Comprehensive Questions & Verified
Answers | 100% Correct -The Ultimate Guide for Yr. (2026/2027)
Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
Name _______
True or False (Your answer selections here go on a Scantron Sheet) (Note: A=True, B=False) 1.
True or False: All fish have scales.
2. True or False: A “surface orientated” fish that feeds from the surface would likely have a superior
mouth.
3. True or False: Teeth in many Chondrichthyes are modified scales.
4. True or False: A fish that is heterozygotic (for a trait) has two different alleles for the trait.
5. True or False: The high diversity if fish is due in large part to the number and isolation of different
fresh water locations.
6. True or False: All fish are ectothermic.
7. True or False: Marine fish have larger swim bladders
8. True or False: Fish breathing is unidirectional.
9. True or False: There is more than one type of Leukocyte.
10. True or False: Most fish are ectothermic
Multiple Choice (Your answer selections here go on a Scantron Sheet)
11. Which one of the following major evolutionary fish groups would be/is most prevalent in the fossil
record?
a. Chondricthyes
b. Osteichthyes
c. Conodonts
d. Ostracoderms.
12. Which of the following most correctly represents the percentage distribution of fish between fresh
and marine waters
a. 58% marine, 41% fresh b. 50% marine, 50% fresh
c. 58% fresh, 41% marine
PALMER 1/31/2025
,Skagit Valley College Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
ENVC-123 Winter 2025
d. 80% marine, 20% fresh
e. 80% fresh, 20% marine
13. Which of the following correctly reflects the three necessary steps of speciation (in correct order):
a. Gene pool isolation, reproductive isolation, change in gene pool.
b. Reproductive isolation, change in gene pool, gene pool isolation
c. Change in gene pool, reproductive isolation, gene pool isolation
d. Gene pool isolation, change in gene pool, reproductive isolation.
14. The dorsal and anal fins of a fish with the “lie in wait” body form would be located ______________
on their body.
a. farther apart
b. farther
back
c. farther forward
d. central
15. Which of the following correctly represents the percentage (%) of marine fish species distribution
near land?
78
a.
b. 68
c. 58
d. 88
e. 37
16. Which of the following characteristics of water has the greatest effect on fish distribution:
Low light transmission
a.
b. Low compressibility
c. Universal solvent
d. Density
17. Darwin explained in his book how natural selection could result in __________. a. Evolution
b. Isolation
c. Migration
d. Maturation
e. Revelation
PALMER 1/31/2025
, Skagit Valley College Exam I (Chpts. 1, 12 13, 2, 3, 4, 5, 6)
ENVC-123 Winter 2025
18. In the binomial nomenclature system __________ is used to ensure no change in the meaning of an
organisms name.
a. Greek
b. English
c. French
d. Latin
e. Spanish
19. Which of the following taxonomic terms specifies a particular organism? a. genus
b. species
c. class
d. family
20. A trait on a fish, used for classifying or keying, that can be counted is a _____________ trait. a.
meristic
b. morphometric
c. metered
d. primary
e. karyotype
21. Which of the following scale types would not be found on “bony fish”? a. elasmoid
b. placoid
c. scutes
d. cycloid
e. ctenoid
22. Which of the following lists shows the classification levels in order from broadest (most inclusive)
grouping to narrowest (least inclusive) grouping
A) Family, Class, Phylum, Kingdom Domain, Genus, Order, Species.
B) Genus, Family, Class, Phylum, Kingdom, Domain, Order, Species. C) Domain,
Kingdom, Family, Class, Phylum, Genus, Order, Species.
D) Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
E) Genus, Order, Species, Family, Class, Phylum, Kingdom, Domain.
23. Within the study of phylogenetic systematics a group of different species in which every member
(different species or groups) can be connected back to a single common ancestor is considered a
_____________ group:
a. monophyletic
b. paraphyletic
c. polyphyletic
d. multiphyletic
PALMER 1/31/2025
