BISC 111 EXAM 2 2026
1. What process do fungi use to break down food outside their bodies?
Photosynthesis
External digestion
Fermentation
Internal digestion
2. If a species of insect undergoes complete metamorphosis, how might
this affect its ecological niche compared to an insect that undergoes
incomplete metamorphosis?
It will not have any significant impact on its ecological niche.
It will only be able to exploit resources as an adult, limiting its
ecological role.
It will have a similar ecological niche throughout its life stages,
leading to increased competition.
It may occupy different ecological niches at different life
stages, allowing for diverse resource exploitation and reduced
competition.
3. Cephalopods are remarkable creatures with many interesting features.
Which of the following is NOT a feature normally associated with
cephalopods?
A closed circulatory system (with some exceptions).
A siphon used in combination with mantle contractions for jet
propulsion.
A molluskan "foot" subdivided into arms and tentacles, which
often have suckers for grasping.
, A well-developed nervous system capable of sophisticated
problem solving; often considered intelligent.
A lophophore shaped like a pair of spirals.
4. Myriapods are in which Phylum?
Onychophora
Echinodermata
Arthropoda
Annelida
Nematoda
5. What is a key characteristic of diatoms?
They have silica cell walls.
They reproduce only sexually.
They are multicellular organisms.
They lack chlorophyll.
6. Aerobic organisms are best characterized as?
Non-oxygen-requiring
Pathogenic
Nonpathogenic
Oxygen-requiring
7. Describe how external digestion in fungi differs from the digestion
process in animals.
Fungi absorb food directly without any digestion, while animals
use external digestion.
, Fungi and animals both rely on photosynthesis for digestion.
Fungi and animals both digest food internally using enzymes.
Fungi perform external digestion by secreting enzymes outside
their bodies to break down food, while animals digest food
internally.
8. What are ciliates?
pheromones
cellular organelles (vacuoles) for digestion
type of single-celled microorganisms which have hair-like
extensions used for movement and capturing food particles
mitosis
9. Describe how colubrid snakes adapt to their environments compared to
other snake families.
Colubrid snakes adapt to various environments through their
diverse habitats and diets, allowing them to thrive in different
ecological niches.
Colubrid snakes do not adapt to their environments.
Colubrid snakes only adapt by changing their color.
Colubrid snakes are limited to specific habitats and have a
narrow diet.
10. What pigments are primarily responsible for the color of red and green
algae?
Carotenoids and xanthophylls
Chlorophyll and phycoerythrin
Beta-carotene and phycocyanin
, Melanin and anthocyanins
11. Trypanosoma is a parasitic kinetoplastid that causes a potentially fatal
human disease known as ___ _.
hiker's sickness
malaria
dysentery
African sleeping sickness
12. Describe the role of mycorrhizae in plant health and growth.
Mycorrhizae are harmful to plant growth.
Mycorrhizae solely assist in water retention.
Mycorrhizae provide structural support to plants.
Mycorrhizae enhance nutrient absorption for plants,
particularly phosphorus.
13. What are the two main components that make up lichen?
A plant and a protist
A bacterium and a virus
A fungus and a plant
A fungus and an alga or cyanobacterium
14. Describe how the operculum contributes to the respiratory system of
bony fish.
The operculum covers the gills, allowing for efficient water
flow over them, which is essential for respiration.
The operculum is involved in the excretion of waste products.
1. What process do fungi use to break down food outside their bodies?
Photosynthesis
External digestion
Fermentation
Internal digestion
2. If a species of insect undergoes complete metamorphosis, how might
this affect its ecological niche compared to an insect that undergoes
incomplete metamorphosis?
It will not have any significant impact on its ecological niche.
It will only be able to exploit resources as an adult, limiting its
ecological role.
It will have a similar ecological niche throughout its life stages,
leading to increased competition.
It may occupy different ecological niches at different life
stages, allowing for diverse resource exploitation and reduced
competition.
3. Cephalopods are remarkable creatures with many interesting features.
Which of the following is NOT a feature normally associated with
cephalopods?
A closed circulatory system (with some exceptions).
A siphon used in combination with mantle contractions for jet
propulsion.
A molluskan "foot" subdivided into arms and tentacles, which
often have suckers for grasping.
, A well-developed nervous system capable of sophisticated
problem solving; often considered intelligent.
A lophophore shaped like a pair of spirals.
4. Myriapods are in which Phylum?
Onychophora
Echinodermata
Arthropoda
Annelida
Nematoda
5. What is a key characteristic of diatoms?
They have silica cell walls.
They reproduce only sexually.
They are multicellular organisms.
They lack chlorophyll.
6. Aerobic organisms are best characterized as?
Non-oxygen-requiring
Pathogenic
Nonpathogenic
Oxygen-requiring
7. Describe how external digestion in fungi differs from the digestion
process in animals.
Fungi absorb food directly without any digestion, while animals
use external digestion.
, Fungi and animals both rely on photosynthesis for digestion.
Fungi and animals both digest food internally using enzymes.
Fungi perform external digestion by secreting enzymes outside
their bodies to break down food, while animals digest food
internally.
8. What are ciliates?
pheromones
cellular organelles (vacuoles) for digestion
type of single-celled microorganisms which have hair-like
extensions used for movement and capturing food particles
mitosis
9. Describe how colubrid snakes adapt to their environments compared to
other snake families.
Colubrid snakes adapt to various environments through their
diverse habitats and diets, allowing them to thrive in different
ecological niches.
Colubrid snakes do not adapt to their environments.
Colubrid snakes only adapt by changing their color.
Colubrid snakes are limited to specific habitats and have a
narrow diet.
10. What pigments are primarily responsible for the color of red and green
algae?
Carotenoids and xanthophylls
Chlorophyll and phycoerythrin
Beta-carotene and phycocyanin
, Melanin and anthocyanins
11. Trypanosoma is a parasitic kinetoplastid that causes a potentially fatal
human disease known as ___ _.
hiker's sickness
malaria
dysentery
African sleeping sickness
12. Describe the role of mycorrhizae in plant health and growth.
Mycorrhizae are harmful to plant growth.
Mycorrhizae solely assist in water retention.
Mycorrhizae provide structural support to plants.
Mycorrhizae enhance nutrient absorption for plants,
particularly phosphorus.
13. What are the two main components that make up lichen?
A plant and a protist
A bacterium and a virus
A fungus and a plant
A fungus and an alga or cyanobacterium
14. Describe how the operculum contributes to the respiratory system of
bony fish.
The operculum covers the gills, allowing for efficient water
flow over them, which is essential for respiration.
The operculum is involved in the excretion of waste products.
