Bio 109 Exam 1 Questions and Answers
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What is NOT true about the bacterial cell wall? It is the source of endotoxins in gram
positive bacteria
Some antibiotics can block protein synthesis in bacteria without affecting the cells of the
eukaryotic host. This is possible because: Bacterial ribosomes are different than
eukaryotic ribosomes in protein content and RNA content
All of the following statements accurately describe protists except: Like prokaryotes,
protist lack a nucleus and other membrane-bound organelles
Kinetoplastids cause several human diseases. Which of these diseases does not involve a
kinetoplastid? Malaria
In one stage of the sexual life cycle of fungi, the haploid nuclei of two different individuals fuse.
This stage is called: Karyogamy
,The absorptive nutrition of fungi is made more effective by: The large surface area
provided by the mycelium
Which of the following associations is not an example of symbiosis? A saprobe that
absorbs nutrients from non-living organic material
A student finds an organism in a pond and thinks it is a freshwater sponge. Another student
thinks it looks more like an aquatic fungus. How can they decide whether it is an animal or a
fungus? Look for cell walls under a microscope
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that
comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves
between larger, underlying cells (spiral cleavage). This embryo may potentially develop into
a(n): Earthworm
Which of these is not an animal? Choanoflagellate
The sac fungi _________ is named for the ascus, a reproductive structure that contains spores.
Ascomycota
, Members of this fungal phylum form arbuscular mycorrhhizae with the roots of plants
Glomeromycota
At which developmental stage should one be able to first distinguish a diploblastic embryo from
a triploblastic embryo? Gastrulation
Dr. M finds that is she removes one cell at the four-cell stage from a particular embryo, the
remaining cells develop into a complete organism. The organism must be a(n): Sea star
In the sexual life cycle of fungi, the term karyogamy refers to: the fusion of haploid nuclei
Which of the following statements concerning fungi is true? Some fungal species live as
decomposers and others and others as symbionts
Bilateral symmetry is associated with _______, which refers to the localization of sensory
structures in a distinct head region. cephalization
Verified by Experts
What is NOT true about the bacterial cell wall? It is the source of endotoxins in gram
positive bacteria
Some antibiotics can block protein synthesis in bacteria without affecting the cells of the
eukaryotic host. This is possible because: Bacterial ribosomes are different than
eukaryotic ribosomes in protein content and RNA content
All of the following statements accurately describe protists except: Like prokaryotes,
protist lack a nucleus and other membrane-bound organelles
Kinetoplastids cause several human diseases. Which of these diseases does not involve a
kinetoplastid? Malaria
In one stage of the sexual life cycle of fungi, the haploid nuclei of two different individuals fuse.
This stage is called: Karyogamy
,The absorptive nutrition of fungi is made more effective by: The large surface area
provided by the mycelium
Which of the following associations is not an example of symbiosis? A saprobe that
absorbs nutrients from non-living organic material
A student finds an organism in a pond and thinks it is a freshwater sponge. Another student
thinks it looks more like an aquatic fungus. How can they decide whether it is an animal or a
fungus? Look for cell walls under a microscope
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that
comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves
between larger, underlying cells (spiral cleavage). This embryo may potentially develop into
a(n): Earthworm
Which of these is not an animal? Choanoflagellate
The sac fungi _________ is named for the ascus, a reproductive structure that contains spores.
Ascomycota
, Members of this fungal phylum form arbuscular mycorrhhizae with the roots of plants
Glomeromycota
At which developmental stage should one be able to first distinguish a diploblastic embryo from
a triploblastic embryo? Gastrulation
Dr. M finds that is she removes one cell at the four-cell stage from a particular embryo, the
remaining cells develop into a complete organism. The organism must be a(n): Sea star
In the sexual life cycle of fungi, the term karyogamy refers to: the fusion of haploid nuclei
Which of the following statements concerning fungi is true? Some fungal species live as
decomposers and others and others as symbionts
Bilateral symmetry is associated with _______, which refers to the localization of sensory
structures in a distinct head region. cephalization
