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WSU BIOLOGY 106 EXAM 3
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WSU BIOLOGY 106 EXAM 3
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WSU BIOLOGY 106 EXAM 3 ACTUAL EXAM 2 LATEST VERSIONS(VERSION A & B) ACTUAL EXAM
What role do each of the components of natural selection play in pushing
populations toward becoming better adapted for the environment in which they
live? (mutation, heritable variation, selective pressures, reproduction) - ANSWER: -
leads to evolutionary change when individuals with certain characteristics have a
greater survival or reproductive rate than other individuals in a population
-pass on these inheritable genetic characteristics to their offspring
What are the two major misconceptions about natural selection discussed in this
lab? - ANSWER: First:
populations do not change because they "need" to or because its a good idea
Second:
individuals don't adapt themselves
What is an animal? - ANSWER: -a living organism that feeds on organic matter
-typically having specialized sense organs
-nervous system and able to respond rapidly to stimuli
-body symmetry, number of tissue layers, body cavity and embryonic development
Which animals rely on filter feeding? - ANSWER: -Choanocytes
-Porifera
What two traits allowed the arthropods to diversify so much? - ANSWER: -
segmented body
-jointed appendages
Give some examples of tagma in arthropods - ANSWER: The appendages can be used
for:
-feeding
-locomotion
-defense
Molting - ANSWER: Process in which an arthropod sheds its exoskeleton and
manufactures a larger one to take its place
What are the major groups of arthropods? - ANSWER: -Chelicerata
, -Crustacea
-Insecta
Describe complete vs. incomplete metamorphosis (insects) - ANSWER: Complete: is
where the larvae look different than the adults
Incomplete: means the larvae look just like the adults
The echinoderms exhibit pentaradial body plans, so why are they included in the
Bilateral animals (the "Bilateria")? - ANSWER: Because their larvae exhibit bilateral
symmetry
What are the three subgroups of Chordata (both scientific and common names for
two)? - ANSWER: -Urochordates (Sea Squirts)
-Cephalochordates (Lancelets)
-Vertebrates
Which are the "invertebrate" chordates? - ANSWER: -Urochordates
-Cephalochordates
What do the various chordate defining traits become in the Vertebrates?
(e.g., the notochord becomes the vertebral dics) - ANSWER: The pharyngeal arches
become the jaw
Why are "essential amino acids" called "essential - ANSWER: -make a complete set of
proteins
-are required in the human diet
What is chemical energy used for? - ANSWER: -it is converted into ATP
-then used for growth, reproduction, and repair
Which macromolecules (protein, sugar, fat, starch) are major components of
carnivore, herbivore (foliage, seeds, fruit), omnivore diets? - ANSWER: Carnivore:
-lipids (fats)
-proteins
Herbivores:
-foliage - sugar
-seed - protein
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