Quiz 1 questions

Question 1

A chemoautotroph uses:
CO2 as its source of energy and carbon
Organic molecules for energy and as a carbon source
CO2 for carbon and inorganic substances such as H25 as an energy source
Light energy to drive the synthesis of organic compounds from CO2
Light as both its source of energy and its source of carbon

Answer 1

CO2 for carbon and inorganic substances such as H25 as an energy source

Question 2

Jams, jellies, preserves, honey, and other foods with high sugar content hardly ever become contaminated by bacteria. This is because bacteria that encounter such an environment:
Undergo death by plasmolysis
Are unable to metabolize the glucose or fructose and thus starve to death
Undergo death by lysis
Are obligate anaerobes
Are unable to swim through these thick and viscous material

Answer 2

Undergo death by plasmolysis

Question 3

When a non-pathogenic strain of pneumoniae is mixed with a heat-killed pathogenic strain, the non-pathogenic strain is converted to the pathogenic form. The process responsible for this conversion is called:
Conjugation
Sexual reproduction
Transformation
Toxification
None of the above

Answer 3

Transformation

Question 4

Some antibiotics can block protein synthesis in bacteria without affecting the cells of the eukaryotic host. This is possible because:
Bacteria can use a much greater variety of food sources than can eukaryotes
Transformation occurs in the nucleus while transcription takes place in the cytoplasm
Bacterial ribosomes are different than eukaryotic ribosomes in protein content and RNA content
Ribosomes are not found in prokaryotes

Answer 4

Bacterial ribosomes are different than eukaryotic ribosomes in protein content and RNA content

Question 5

Some protists can switch from an autotrophic nutritional mode to a heterotrophic one when sunlight is unavailable. These species are called:
Autoheterotrophs
Photoautotrophs
Mixotrophs
Chemoautotrophs
Changeotrophs

Answer 5

Mixotrophs

Question 6

A _____ is a reproductive structure of fungi that develops from mycelium.
Lichen
Mycorrhiza
Fruiting body
Saprobe
Haustoria

Answer 6

Fruiting body

Question 7

If you wanted to find Glomeromycota species, where is the best place to look?
Under rocks
In a Brewmeister’s vat
Between the toes of a person with athlete’s foot
On the wings of a honeybee
In the roots of a vascular plant

Answer 7

In the roots of a vascular plant

Question 8

The impressive diversification of animal body plans that occurred during the Cambrian period likely had several contributing causes, which of the following likely did not contribute?
The emergence of complex predator prey relationships
Changes in atmospheric oxygen levels
Variation in expression of HOX genes
Formation of the supercontinent Pangea

Answer 8

Formation of the supercontinent Pangea

Question 9

Radial symmetry is generally associated with:
Protostome development
The presence or absence of true tissue
A sessile lifestyle
The presence of a coelom
A lifestyle involving active movement from place to place

Answer 9

A sessile lifestyle

Question 10

At which developmental stage should one be able to first distinguish a diploblastic embryo from a triploblastic embryo?
Fertilization
Cleavage
Gastrulation
Coelom formation
Metamorphosis

Answer 10

Gastrulation

Question 11

Which of the following pairs of phylum and example species is incorrect?
Platyhelminthes - Flatworm
Porifera - Sponge
Cnidaria - Coral
Echinodermata - Sea cucumber
Nemertea - Roundworm
Arthropoda - Crab

Answer 11

Nemertea - Roundworm
Nemertea are Ribbon worms
Round worms are nematode

Question 12

Which of the following combination of phylum and description is incorrect?
Echinodermata - Bilateral symmetry as larvae, coelom present
Nematoda - Roundworms, pseudocoelomates
Cnidaria - Radial symmetry, polyp and medusa body forms
Platyhelminthes - Segmented worms, alimentary canal, coelomate
Porifera - No true tissue

Answer 12

Platyhelminthes - Segmented worms, alimentary canal, coelomate

Question 13

Corals are most closely related to which group?
Bivalves
Sea anemones
Comb jellies
Sponges
Barnacles

Answer 13

Sea anemones

Question 14

What is the phylum name for comb jellies?
Platyhelminthes
Nematoda
Cnidaria
Ctenophora

Answer 14

Ctenophora

Question 15

While scuba diving, Dr. M. observes several tube-dwelling marine worms that have a horseshoe-shaped ring of tentacles encircling their mouths. No segmentation or parapodia are evident. The worms belong to the phylum:
Gastropod
Cephalopoda
Cnidaria
Polychaeta
Phoronid

Answer 15

Phoronid

Question 16

Which of the following are characteristics of arthropods?
Protostome development, bilateral symmetry, and two embryonic germ layers
A pseudocoelom, two embryonic germ layers, and a closed circulatory systems
Protostome development and bilateral symmetry
Bilateral symmetry and a pseudocoelom
Bilateral symmetry, a pseudocoelom, and a closed circulatory system

Answer 16

Protostome development and bilateral symmetry

Question 17

Eukaryotic and prokaryotic cells have many differences. Which of the following is not an accurate description of a difference?
Eukaryotic cells have larger, more complex genomes
Prokaryotic cells generally have more complex cell walls
Eukaryotic cell walls have linear chromosomes
Prokaryotic cells lack compartmentalization by internal membranes
Prokaryotic cells lack ribosomes

Answer 17

Prokaryotic cells lack ribosomes

Question 18

The mechanics whereby genes are transferred by viruses (phages) from one bacterium to another is called:
Transduction
Conjugation
Intuition
Binary fission
Transformation

Answer 18

Transduction

Question 19

Protists are different from prokaryotes because protists have:
A cell wall
A nuclear membrane
Flagella
Autotrophic nutrition
Ribosomes

Answer 19

A nuclear membrane

Question 20

In one stage of the sexual life style of fungi. The haploid nuclei of two different individuals fuse. This stage is called:
Karyogamy
Plasmogamy
Haustoria
meiosis

Answer 20

Karyogamy

Question 21

Spiral determinate cleavage would be found for all of the following phyla except:
Arthropoda
Echinodermata
Annelida
Mollusca

Answer 21

Echinodermata

Question 22

A species of aquatic invertebrate is discovered anchored by a stalk to its substrate. In addition to the stalk, the animal also has two calcium carbonate and a horseshoe shaped crown of ciliated tentacles that surround the mouth, which obviously function as a filter feeding device. This animal is a(n):
Brachiopod
Mollusk
Echinoderm
Arthropod
Cnidarian

Answer 22

Brachiopod

Question 23

The heartworms that can accumulate within the heart of dogs and other mammals have a pseudocoelom, an alimentary canal, and an outer covering that is occasionally shed. To which phylum does the heartworm belong?
Platyhelminthes
Arthropods
Nematoda
Phoronid
Annelida

Answer 23

Nematoda