BIOLOGY PROCTORED EXAM PENN FOSTER
QUESTIONS & 100% VERIFIED ANSWER 2025 /
GRADED A+ /GUARANTEED PASS!!
Annelids (phylum Annelida)
- answer-segmented worms are organisms with highly pronounced segmentation as
well as bilateral symmetry
septa: divide the well developed, fluid-filled coelom, which functions to facilitate
movement
-brain connected to a ventral nerve cord
ex: earthworms leeches
Arthropods (Phylum Arthropoda)
- answer-Jointed appendages: hollow tubes moved by muscles, become adapted to
means of locomotion, food gathering and reproduction
Exoskeleton: composed of chitin, strong, flexible, nitrogenous polysaccaride
Segmentation: repeating units of the body
Well-developed nervous system: have a brain and a ventral nerve cord
ex: crustaceans: marine animals= shrimp, lobster, crabs
ex: arachnids: land arthropods= spiders, scorpion, ticks
ex: insects: 6 legs and 1 or 2 pairs of wings= beetle, bees, butterfly
Carbohydrates
- answer-Broken down to glucose to provide energy.
Cell wall
- answer-A rigid structure that surrounds the cell membrane and provides support
to the cell
Characteristics of a less-developed country - answer-- Low GDP per capita
- High levels of poverty
- Dependence on agriculture and the export of primary products
- Highers rates of population growth
- Low levels of productivity
- High levels of unemployment
,Characteristics of a more-developed country - answer-- High standard of living
- High GDP per captia
- Advanced public transportation
- Low poverty
- Low number of homelessness
- High quality of education
- Advanced Military and security
Characteristics of living things - answer--All are composed of cells
-All obtain energy and use it to develop
-Can sense changes in the environment and adjust in response to change
-Exhibit modifications that represent adaptations to their environment
Chordates (phylum Chordata)
- answer-Divided into invertebrates and vertebrates. Include bilaterally
symmetrical animals that have a backbone composed of cartilage or bone
supporting rod (notochord): long stiff tissue that supports the body
Dorsal tubular nerve cord: provides framework from which the nervous system
develops
Pharyngeal pouches: serve functions related to feeding or respiration
Tail: Formed in embryos and extending past the anus
Define the types of locomotion
- answer-Ciliates: hairlike cilia for swimming about to capture food
Amoeboids: use false feet for moving around and capturing prey
Radiolarians: marine amoeboids that form calcium carbonate shells
Zooflagellates: move about by means of long slender extensions called flagella
Sporzoans: Aren't mobile or capable of self propulsion
Describe a basic enzymatic reaction:
- answer-S+E= P+E
E represents the enzyme catalyzing the reaction
S is the substance being changed
P is the product of the reaction
Describe abiotic factors that influence population growth
- answer-include natural disasters such as flash floods and volcanic eruptions
- may radically reduce population but population destiny doesn't affect the
proportion of a population killed
, Describe biotic factors that influence population growth
- answer-competition: for food supply, breeding resources or other resource grows
more intense as population density increases
predation: when densities are high, the instances of predation are greater and the
mortality rate is much higher
Predator-prey: tend to vary in cycles
Describe the evolution of chrodates:
- answer-The earliest chordates were all marine animals. As chordates continued to
evolve, they spread to freshwater habitats and to land. The amphibians represent an
intermediate phase in the water to the land transition of chordates. The evolution of
birds further increases the disturbed of chordates by expanding their populations
into sky habitats.
Describe the factors that are necessary for natural selection to occur: - answer--
Population members exhibit differences that are heritable
- Population members produce more offspring than can be supported by the
environmental resources
- Competition exists between population members for limited resources and results
in increased survival and reproduction of better adapted individuals
- Through many generations, a greater portion of the popopulation exhibits
adaptions to the environment and thus the population as a whole evolves
Describe the fucntion of the digestive system: - answer--Ingesting food
-Break down of food into smaller molecules that can be transported
- Absorbing nutrient molecules
- Eliminating indigestible materials
Mouth: entrance to the system where food is moistened and chewed
Pharynx: short and wide space that serves as a passageway for food and air
Esophagus: extends from the pahrnyx to the stomach
Stomach: secretes acid and enzymes that digest food
- serves as temporary storage for food
Small intestine: receives the chyme from the stomach
Duodenum: receives bile from the liver and digestive enzymes from the pancreas
Large intestine: absorbs water, salts and vitamins
Pancreas: produces insulin
QUESTIONS & 100% VERIFIED ANSWER 2025 /
GRADED A+ /GUARANTEED PASS!!
Annelids (phylum Annelida)
- answer-segmented worms are organisms with highly pronounced segmentation as
well as bilateral symmetry
septa: divide the well developed, fluid-filled coelom, which functions to facilitate
movement
-brain connected to a ventral nerve cord
ex: earthworms leeches
Arthropods (Phylum Arthropoda)
- answer-Jointed appendages: hollow tubes moved by muscles, become adapted to
means of locomotion, food gathering and reproduction
Exoskeleton: composed of chitin, strong, flexible, nitrogenous polysaccaride
Segmentation: repeating units of the body
Well-developed nervous system: have a brain and a ventral nerve cord
ex: crustaceans: marine animals= shrimp, lobster, crabs
ex: arachnids: land arthropods= spiders, scorpion, ticks
ex: insects: 6 legs and 1 or 2 pairs of wings= beetle, bees, butterfly
Carbohydrates
- answer-Broken down to glucose to provide energy.
Cell wall
- answer-A rigid structure that surrounds the cell membrane and provides support
to the cell
Characteristics of a less-developed country - answer-- Low GDP per capita
- High levels of poverty
- Dependence on agriculture and the export of primary products
- Highers rates of population growth
- Low levels of productivity
- High levels of unemployment
,Characteristics of a more-developed country - answer-- High standard of living
- High GDP per captia
- Advanced public transportation
- Low poverty
- Low number of homelessness
- High quality of education
- Advanced Military and security
Characteristics of living things - answer--All are composed of cells
-All obtain energy and use it to develop
-Can sense changes in the environment and adjust in response to change
-Exhibit modifications that represent adaptations to their environment
Chordates (phylum Chordata)
- answer-Divided into invertebrates and vertebrates. Include bilaterally
symmetrical animals that have a backbone composed of cartilage or bone
supporting rod (notochord): long stiff tissue that supports the body
Dorsal tubular nerve cord: provides framework from which the nervous system
develops
Pharyngeal pouches: serve functions related to feeding or respiration
Tail: Formed in embryos and extending past the anus
Define the types of locomotion
- answer-Ciliates: hairlike cilia for swimming about to capture food
Amoeboids: use false feet for moving around and capturing prey
Radiolarians: marine amoeboids that form calcium carbonate shells
Zooflagellates: move about by means of long slender extensions called flagella
Sporzoans: Aren't mobile or capable of self propulsion
Describe a basic enzymatic reaction:
- answer-S+E= P+E
E represents the enzyme catalyzing the reaction
S is the substance being changed
P is the product of the reaction
Describe abiotic factors that influence population growth
- answer-include natural disasters such as flash floods and volcanic eruptions
- may radically reduce population but population destiny doesn't affect the
proportion of a population killed
, Describe biotic factors that influence population growth
- answer-competition: for food supply, breeding resources or other resource grows
more intense as population density increases
predation: when densities are high, the instances of predation are greater and the
mortality rate is much higher
Predator-prey: tend to vary in cycles
Describe the evolution of chrodates:
- answer-The earliest chordates were all marine animals. As chordates continued to
evolve, they spread to freshwater habitats and to land. The amphibians represent an
intermediate phase in the water to the land transition of chordates. The evolution of
birds further increases the disturbed of chordates by expanding their populations
into sky habitats.
Describe the factors that are necessary for natural selection to occur: - answer--
Population members exhibit differences that are heritable
- Population members produce more offspring than can be supported by the
environmental resources
- Competition exists between population members for limited resources and results
in increased survival and reproduction of better adapted individuals
- Through many generations, a greater portion of the popopulation exhibits
adaptions to the environment and thus the population as a whole evolves
Describe the fucntion of the digestive system: - answer--Ingesting food
-Break down of food into smaller molecules that can be transported
- Absorbing nutrient molecules
- Eliminating indigestible materials
Mouth: entrance to the system where food is moistened and chewed
Pharynx: short and wide space that serves as a passageway for food and air
Esophagus: extends from the pahrnyx to the stomach
Stomach: secretes acid and enzymes that digest food
- serves as temporary storage for food
Small intestine: receives the chyme from the stomach
Duodenum: receives bile from the liver and digestive enzymes from the pancreas
Large intestine: absorbs water, salts and vitamins
Pancreas: produces insulin
