BIOLOGY 101 EXAM #1 (SDSU
EKDALE) QUESTIONS & ANSWERS
RATED 100% CORRECT
The ability of an individual to survive and reproduce in its environment relative to other
individuals is called its: - correct answer ✔✔fitness
The specific study of multicellular and heterotrophic organisms that acquire nutrition through
ingestion is also know as: - correct answer ✔✔Zoology
____recognized that heritable traits of an organism were passed from parent to offspring on
"genes" - correct answer ✔✔Gregor Mendel
An adaptation is a feature that: - correct answer ✔✔increases the chance that an individual will
reproduce
Certain species of land snail are found in isolated populations in high elevation habitats on
mountaintops. There are mountain ranges in which different mountaintops will have different,
but very closely related, species of snails. The snails cannot survive if they travel to lower
elevations--thus the snails cannot move to populations on other mountains (i.e., the various
species are both reproductively and geographically isolated.) Evolutionary biologists studying
these snails have argued that the different species of snail arose through the process of: -
correct answer ✔✔allopatric speciation
The physical expression of an organism's genetic constitution is called its: - correct answer
✔✔phenotype (visible or expressed characteristics of an organism, influenced by the genotype)
What does the theory of endosymbiosis explain? - correct answer ✔✔Evolution of the
eukaryotic cell
, Why is taxonomy, or the naming and organizing of organisms, important? - correct answer
✔✔All of the above.
Two different groups of organisms are termed sister taxa if: - correct answer ✔✔they share
common ancestry with each other more recently than either one does with any other
organisms
A membrane-bound nucleus within the cell is a synapomorphy for the monophyletic group
called - correct answer ✔✔Eukarya
Cilia, flagella, and pseudopods are structures found in some unicellular "protists" that: - correct
answer ✔✔allow the organisms to move
British geologist Charles Lyell popularized the principle of uniformitarianism, which states that: -
correct answer ✔✔natural laws of physics and chemistry have remained constant throughout
Earth's history
A synapomorphy: - correct answer ✔✔a heritable attribute that is shared between two or more
taxa
What is the name of the major clade of life that is the sister taxon to Animalia? - correct answer
✔✔Choanoflagellatea
The oldest fossil, which represents the first life form on Earth, is similar in structure to living: -
correct answer ✔✔Bacteria
The divergence (splitting) of two species from one is known as: - correct answer ✔✔speciation
EKDALE) QUESTIONS & ANSWERS
RATED 100% CORRECT
The ability of an individual to survive and reproduce in its environment relative to other
individuals is called its: - correct answer ✔✔fitness
The specific study of multicellular and heterotrophic organisms that acquire nutrition through
ingestion is also know as: - correct answer ✔✔Zoology
____recognized that heritable traits of an organism were passed from parent to offspring on
"genes" - correct answer ✔✔Gregor Mendel
An adaptation is a feature that: - correct answer ✔✔increases the chance that an individual will
reproduce
Certain species of land snail are found in isolated populations in high elevation habitats on
mountaintops. There are mountain ranges in which different mountaintops will have different,
but very closely related, species of snails. The snails cannot survive if they travel to lower
elevations--thus the snails cannot move to populations on other mountains (i.e., the various
species are both reproductively and geographically isolated.) Evolutionary biologists studying
these snails have argued that the different species of snail arose through the process of: -
correct answer ✔✔allopatric speciation
The physical expression of an organism's genetic constitution is called its: - correct answer
✔✔phenotype (visible or expressed characteristics of an organism, influenced by the genotype)
What does the theory of endosymbiosis explain? - correct answer ✔✔Evolution of the
eukaryotic cell
, Why is taxonomy, or the naming and organizing of organisms, important? - correct answer
✔✔All of the above.
Two different groups of organisms are termed sister taxa if: - correct answer ✔✔they share
common ancestry with each other more recently than either one does with any other
organisms
A membrane-bound nucleus within the cell is a synapomorphy for the monophyletic group
called - correct answer ✔✔Eukarya
Cilia, flagella, and pseudopods are structures found in some unicellular "protists" that: - correct
answer ✔✔allow the organisms to move
British geologist Charles Lyell popularized the principle of uniformitarianism, which states that: -
correct answer ✔✔natural laws of physics and chemistry have remained constant throughout
Earth's history
A synapomorphy: - correct answer ✔✔a heritable attribute that is shared between two or more
taxa
What is the name of the major clade of life that is the sister taxon to Animalia? - correct answer
✔✔Choanoflagellatea
The oldest fossil, which represents the first life form on Earth, is similar in structure to living: -
correct answer ✔✔Bacteria
The divergence (splitting) of two species from one is known as: - correct answer ✔✔speciation
