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BYU Bio 220 (Rader) Exam 1 | Questions with
100% Correct Answers (Verified) | Latest
Update 2025 |Guaranteed A+
Name the 4 Protista that affect humans and HOW they affect us - CORRECT✓✓ 1. Giardia- contaminated cold
water
2. African Sleeping Sickness- transmitted by Tsetse fly
3. Malaria- transmitted by mosquitos
4. Red Tide- Bloom of dinoflagellates that release neurotoxins
What is the life cycle of a trematode? (liver fluke) - CORRECT✓✓ 1. Eggs passed through human feces
2. snail eat human feces with eggs
3. Cercariae leave snail and burrow into fish
4. Human eat undercooked fish
5. Metacercaria move to liver and become flukes
Life cycle of a cestode (tape worm) - CORRECT✓✓ 1. Human pass eggs through feces
2. cow eats grass with eggs
3. Human eats undercooked meat
*strobilization is tapeworms adding segments
Describe the life cycle of Malaria - CORRECT✓✓ 1. Uninfected mosquito bites infected human and spits
analgesic to numb the spot.
2. Then spits an anticoagulant to get blood flowing.
3. It sucks in GAMETOCYTES.
4. It goes and bites another human and spits the gametocytes into blood stream.
5. The gametocytes become SPOROZOITES and travel to liver.
6. Liver cells rupture.
7. MEROZOITES are released.
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8. They become gametocytes and the cycle continues.
Describe Fire Coral's defense mechanism - CORRECT✓✓ 1. Cnidocil is stimulated
2. The toxic proteins in the NEMATOCYST release calcium ions which increase the osmotic pressure.
3. Water rushes into the cnidocyte and the resulting pressure on the nematocyst cause the operculum to burst off.
4. The thread shoots into the victim and toxic proteins flow through the thread and into the victim.
Be able to recognize cnidocil, operculum, nematocyst, and cnidocyte on a picture. - CORRECT✓✓
Be able to draw or identify what phagocytosis looks like - CORRECT✓✓
Study the flow chart - CORRECT✓✓
clade - CORRECT✓✓ group that evolved from a common ancestor
synapomorphy - CORRECT✓✓ a derived characteristic shared by all taxa within a clade (and not shared by
anyone else)
monophyly - CORRECT✓✓ group of species characterized by synapomorphy
What is special about the Calc sponge? - CORRECT✓✓ It is more closely related to the cnidarians than it is the
other sponges
4 Components of Evolution - CORRECT✓✓ 1. Adaptation by natural selection
2. Speciation
3. Common descent with modification
4. Extinction
Aristotle's Scala Naturae - CORRECT✓✓ all living organisms arranged on a FIXED hierarchy of increasing
complexity
How old is earth? - CORRECT✓✓ 4.6 billion
What are the earliest fossils? And how old are they? - CORRECT✓✓ Stromatolites (blue-green algae)
They are 3.5 billion years old
What is significant about the cambrian explosion? - CORRECT✓✓ It lead to all the body types we have today.
The number of species on earth expanded immensely
What does the Origin of Species discuss? - CORRECT✓✓ 1. Descent with modification produces nested
hierarchy of relationships
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2. Natural selection is a mechanism for change in natural populations
D&C 59:20 - CORRECT✓✓
What are the characteristics of a metazoan? - CORRECT✓✓ Metazoan=animal
1. Eukaryotic
2. Multicellular
3. Fixed Body Plan
4. Motile
5. Heterotrophic
Holocene Mass Extinction - CORRECT✓✓ Caused by humans.
-climate change
-habitat loss
-ocean acidification
-deforestation
What is a protist?
How did they come about?
How do they feed? - CORRECT✓✓ -Single cell eukaryote
-Symbiogenesis(endosymbiosis)
-via phagocytosis/intercellular digestion
How do cilia and flagella work? - CORRECT✓✓ -Cilia have a power stroke and recovery stroke like a rowboat
-Flagella act like a propeller of a plane and pull the critter through the water. (the doublets flex in sequence to
create the propeller motion)
Dyein arms of flagellum? - CORRECT✓✓ They do all of the pulling on the doublet adjacent to it
Name Type of Test Auto or hetero
Diatoms
Radiolaria
Forams - CORRECT✓✓ Diatoms-silica-autotrophic
BYU Bio 220 (Rader) Exam 1 | Questions with
100% Correct Answers (Verified) | Latest
Update 2025 |Guaranteed A+
Name the 4 Protista that affect humans and HOW they affect us - CORRECT✓✓ 1. Giardia- contaminated cold
water
2. African Sleeping Sickness- transmitted by Tsetse fly
3. Malaria- transmitted by mosquitos
4. Red Tide- Bloom of dinoflagellates that release neurotoxins
What is the life cycle of a trematode? (liver fluke) - CORRECT✓✓ 1. Eggs passed through human feces
2. snail eat human feces with eggs
3. Cercariae leave snail and burrow into fish
4. Human eat undercooked fish
5. Metacercaria move to liver and become flukes
Life cycle of a cestode (tape worm) - CORRECT✓✓ 1. Human pass eggs through feces
2. cow eats grass with eggs
3. Human eats undercooked meat
*strobilization is tapeworms adding segments
Describe the life cycle of Malaria - CORRECT✓✓ 1. Uninfected mosquito bites infected human and spits
analgesic to numb the spot.
2. Then spits an anticoagulant to get blood flowing.
3. It sucks in GAMETOCYTES.
4. It goes and bites another human and spits the gametocytes into blood stream.
5. The gametocytes become SPOROZOITES and travel to liver.
6. Liver cells rupture.
7. MEROZOITES are released.
, Page |2
8. They become gametocytes and the cycle continues.
Describe Fire Coral's defense mechanism - CORRECT✓✓ 1. Cnidocil is stimulated
2. The toxic proteins in the NEMATOCYST release calcium ions which increase the osmotic pressure.
3. Water rushes into the cnidocyte and the resulting pressure on the nematocyst cause the operculum to burst off.
4. The thread shoots into the victim and toxic proteins flow through the thread and into the victim.
Be able to recognize cnidocil, operculum, nematocyst, and cnidocyte on a picture. - CORRECT✓✓
Be able to draw or identify what phagocytosis looks like - CORRECT✓✓
Study the flow chart - CORRECT✓✓
clade - CORRECT✓✓ group that evolved from a common ancestor
synapomorphy - CORRECT✓✓ a derived characteristic shared by all taxa within a clade (and not shared by
anyone else)
monophyly - CORRECT✓✓ group of species characterized by synapomorphy
What is special about the Calc sponge? - CORRECT✓✓ It is more closely related to the cnidarians than it is the
other sponges
4 Components of Evolution - CORRECT✓✓ 1. Adaptation by natural selection
2. Speciation
3. Common descent with modification
4. Extinction
Aristotle's Scala Naturae - CORRECT✓✓ all living organisms arranged on a FIXED hierarchy of increasing
complexity
How old is earth? - CORRECT✓✓ 4.6 billion
What are the earliest fossils? And how old are they? - CORRECT✓✓ Stromatolites (blue-green algae)
They are 3.5 billion years old
What is significant about the cambrian explosion? - CORRECT✓✓ It lead to all the body types we have today.
The number of species on earth expanded immensely
What does the Origin of Species discuss? - CORRECT✓✓ 1. Descent with modification produces nested
hierarchy of relationships
, Page |3
2. Natural selection is a mechanism for change in natural populations
D&C 59:20 - CORRECT✓✓
What are the characteristics of a metazoan? - CORRECT✓✓ Metazoan=animal
1. Eukaryotic
2. Multicellular
3. Fixed Body Plan
4. Motile
5. Heterotrophic
Holocene Mass Extinction - CORRECT✓✓ Caused by humans.
-climate change
-habitat loss
-ocean acidification
-deforestation
What is a protist?
How did they come about?
How do they feed? - CORRECT✓✓ -Single cell eukaryote
-Symbiogenesis(endosymbiosis)
-via phagocytosis/intercellular digestion
How do cilia and flagella work? - CORRECT✓✓ -Cilia have a power stroke and recovery stroke like a rowboat
-Flagella act like a propeller of a plane and pull the critter through the water. (the doublets flex in sequence to
create the propeller motion)
Dyein arms of flagellum? - CORRECT✓✓ They do all of the pulling on the doublet adjacent to it
Name Type of Test Auto or hetero
Diatoms
Radiolaria
Forams - CORRECT✓✓ Diatoms-silica-autotrophic
