Notes

Euglena is an example of a protist that

• is both autotrophic and heterotrophic (correct answer)
• is only a parasitic heterotroph
• is always autotrophic (your response)
• swims away from light

Points earned: 0 out of 1

Which of the following would represent the strand of DNA from which the mRNA strand in the diagram was made?

• CUCGGGGAGCCU
• GGGCAUUACGGU
• GAGTTCACGAAG (correct answer)
• AGAAAAUAUGGA (your response)

Points earned: 0 out of 1

Plant cells have large membrane bound spaces in which water, waste products, and nutrients are stored. These spaces are known as

• mitochondria (your response)
• chloroplasts
• Golgi bodies
• vacuoles (correct answer)

Points earned: 0 out of 1

A diploid cell is one that

• has two homologues of each chromosome
• is designated by the symbol 2n
• has chromosomes found in pairs
• all of the above (correct answer, your response)

Points earned: 1 out of 1

The phenotype of an organism

• represents its genetic composition
• reflects all the traits that are actually expressed (correct answer)
• occurs only in dominant pure organisms
• cannot be seen (your response)

Points earned: 0 out of 1

A group of organisms of different species living together in a particular place is called

• a community (correct answer)
• a population
• a biome (your response)
• a habitat

Points earned: 0 out of 1

When muscles are exercised extensively in the absence of sufficient oxygen,

• a large amount of ATP is formed (your response)
• NADH molecules split
• lactic acid is produced (correct answer)
• oxidative respiration ceases

Points earned: 0 out of 1

During meiosis, two successive divisions

• result in the formation of two identical cells
• cause the formation of a zygote
• are responsible for the formation of four haploid cells (correct answer)
• must occur before mitosis can form gametes (your response)

Points earned: 0 out of 1

Protists evolved from

• archaebacteria (correct answer)
• photobacteria
• eubacteria (your response)
• pseudobacteria

Points earned: 0 out of 1

Natural selection causes

• changes in the environment
• plants and animals to produce more offspring than can survive
• changes in the frequency of certain alleles in a population (correct answer)
• all of the above (your response)

Points earned: 0 out of 1

What is the expected phenotypic ratio resulting from a homozygous dominant X heterozygous monohybrid cross?

• 1:3:1
• 1:2:1
• 2:1 (your response)
• 1:0 (correct answer)

Points earned: 0 out of 1

Which of the following pairs contains unrelated terms?

• eukaryote-amoeba
• ribosomes-protein
• cell wall-animal cell (correct answer, your response)
• mitochondria-energy

Points earned: 1 out of 1

The organelles that make sugar in plant cells are the

• chloroplasts (correct answer, your response)
• mitochondria
• Golgi bodies
• ER

Points earned: 1 out of 1

Name the type of cell and organism.


• prokaryote/ protist
• prokaryote/ bacterium (correct answer)
• eukaryote/ protist
• eukaryote/ bacterium (your response)

Points earned: 0 out of 1

The code contained in a particular gene results in the production of

• a variety of type of chemicals
• a specific protein (correct answer)
• certain types of DNA molecules
• particular carbohydrate molecules

Points earned: 0 out of 1

When crossing over takes place, chromosomes

• mutate in the first division
• produce new genes
• decrease in number
• exchange corresponding segments of DNA (correct answer)

Points earned: 0 out of 1

A change in the frequency of a particular gene in one direction in a population is called

• directional selection (correct answer)
• acquired variation
• stabilizing selection
• disruptive selection

Points earned: 0 out of 1

Dogs inside a fenced backyard that growl and bark at an approaching dog are engaging in ___________ behavior

• courtship
• territorial (correct answer)
• migratory
• dominant hierarchy

Points earned: 0 out of 1

Enzymes

• are able to heat up molecules so that they can react
• provide carbon dioxide for chemical reactions
• are biological catalysts (correct answer)
• absorb excess heat so that reactions occur at low temperatures

Points earned: 0 out of 1

Proteins are made in cells on the

• mitochondria
• ribosomes (correct answer)
• nucleus
• cell membrane
• Golgi bodies

Points earned: 0 out of 1

The photosynthetic algae are

• producers (correct answer)
• consumers
• parasites
• herbivores
• decomposers

Points earned: 0 out of 1

Which of the following types of organisms is usually responsible for the final step in a food chain?

• decomposer (correct answer)
• herbivore
• parasite
• carnivore
• producer

Points earned: 0 out of 1

The packaging and distribution center of the cell is the

• nucleus
• Golgi body (correct answer)
• central vacuole
• ER
• nucleolus

Points earned: 0 out of 1

A particularly active cell might contain large numbers of

• chromosomes
• vacuoles
• mitochondria (correct answer)
• Golgi bodies

Points earned: 0 out of 1

The organelles in plant cells that contain a green pigment are the

• mitochondria
• bilayer lipids
• chloroplasts (correct answer)
• Golgi bodies

Points earned: 0 out of 1

What fraction of the offspring resulting from a heterozygous X heterozygous dihybrid cross are homozygous recessive for both traits?

• 9/16
• 1/4
• 3/16
• 1/16 (correct answer)

Points earned: 0 out of 1

Which of the following most accurately describes the structure of a nucleotide?

• amino acid, sugar, base
• phosphate group, sugar, carbohydrate
• sugar, phosphate group, base (correct answer)
• protein, phosphate group, base

Points earned: 0 out of 1

The process by which DNA copies itself is called ___________.

• transcription
• translation
• replication (correct answer)
• DNA polymerase
• RNA polymerase

Points earned: 0 out of 1

The most diverse eukaryotic kingdom is the kingdom of

• protists (correct answer)
• plants
• monerans
• fungi

Points earned: 0 out of 1

The structure that regulates what enters and leaves the cell is called

• the nucleus
• the cell wall
• the nuclear membrane
• the cell membrane (correct answer)

Points earned: 0 out of 1

The sun is considered the ultimate source of energy for life on Earth because

• all organisms carry out photosynthesis
• all organisms carry out cellular respiration
• either photosynthetic organisms or organisms that have eaten them provide energy for all other organisms on Earth (correct answer)
• the sun heats the Earth's atmosphere

Points earned: 0 out of 1

Only eukaryotic cells have

• DNA
• membrane-bound organelles (correct answer)
• ribosomes
• cytoplasm

Points earned: 0 out of 1

Cell membranes are composed of how many major layers?

• 1
• 2 (correct answer)
• 3
• 4

Points earned: 0 out of 1

Which of the following is not found in DNA?

• adenine
• cytosine
• uracil (correct answer)
• thymine
• none of the above

Points earned: 0 out of 1

Which of the following types of succession would most likely occur following a forest fire?

• primary successtion
• secondary succession (correct answer)
• old field succession
• lake succession

Points earned: 0 out of 1

Fragile blood cells with an irregular shape that may block blood vessels is a symptom of a genetic disease known as _____________.

• Huntignton's
• Sickle Cell Anemia (correct answer)
• Cystic Fibrosis
• Hemophilia
• Color Blindness

Points earned: 0 out of 1

RNA differs from DNA in that RNA

• is single-stranded
• contains a different sugar molecule
• contains a different nitrogen base
• all of the above (correct answer)

Points earned: 0 out of 1

How are chloroplasts like mitochondria?

• they can both use energy from sunlight
• they look alike
• they both manufacture food and release energy (correct answer)
• they are both found in animal cells

Points earned: 0 out of 1

The internal transport system of the cell consists of a