Penn Foster Biology Proctored Exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What are the Adaptations in Australopithecus Afarensi - CORRECT ANSWER -
Repositioned forearm magnum, Basin, Valgus angle at the knee, Non-Opposable big toe
what is the repositioned forearm magnum - CORRECT ANSWER - the spinal cord enters
the skill from the base rather then the back
what is a Basin - CORRECT ANSWER - Shaped pelvis: the pelvis supports and balances
the torso, serving as the body's center of gravity
what is Valgus angle at the knee - CORRECT ANSWER - the femurs point toward the
knees to shift the center of gravity more easily
what is Non-Opposable big toe - CORRECT ANSWER - the toes of the foot are in line to
efficiently direct downward force toward the ground.
what is alternation of generation in plants - CORRECT ANSWER - Plants have a life
cycle with two distinct stages, the GAMETOPHYTE stage and the SPOROPHYTE stage.
Cycling between theses two is known as alternation of generations. In the HAPLOID
GAMETOPHYTE stage, gametes which are reproductive cells, are produced through mitosis.
The male and female gametes fuse to form a diploid zygote, which then develops into the
sporophyte. The mature sporophyte produces spores through meiosis and the spores undergo
mitosis to produce the haploid gametophyte.
What is radial symmetry - CORRECT ANSWER - can be split into two identical halves by
drawing a plan through their longitudinal axis in more than one direction with their mouth
forming one end of this axis. ( jellyfish, anemones, corals, comb jellies, adult sea urchins and
starfish) animals have a top and bottom but not clear left or right or front or back
,What is Bilateral symmetry - CORRECT ANSWER - : can be divided into two mirrored
halves by a sagittal plane through their midline, splitting the animal into the left and right sides.
Bilaterally symmetric animals are usually polarized, having a head and Tail region, and are well
adapted for directional movement
What shape are bacillus bacteria - CORRECT ANSWER - Rod Shaped
What shape are coccus bacteria - CORRECT ANSWER - Ball Shaped
What shape are spirillum bacteria - CORRECT ANSWER - Long spiral shaped
What does blood consist of - CORRECT ANSWER - cells, cell fragments, and fluid called
plasma, which is yellow colored and makes up about 55 percent of human blood
what does blood plasma consist of - CORRECT ANSWER - Blood plasma contains water
and electrolytes, proteins, glucose, and lipids.
What are the most abundant cells in blood - CORRECT ANSWER - Red blood cells are
the most abundent cells in the blood they are also known as erythrocytes
what is white blood cells - CORRECT ANSWER - also known as leukocytes. White blood
cells have nuclei and don't contain hemoglobin and can live for years.
what are cell fragments - CORRECT ANSWER - platelets, also called thrombocytes
What do platelets do - CORRECT ANSWER - platelets help the blood clot to stop
bleeding wounds. Platelets are attracted to a wound activate each other and stick to the wall of
the blood vessel to form a platelet plug
What is the Baltimore Classification? - CORRECT ANSWER - Virus classification based
on nucleic acid genomes and replication type
,what is are biodiversity threats - CORRECT ANSWER - Habitat loss , Invasive Species,
over harvesting, and climate change
What is habitat loss - CORRECT ANSWER - : habitats can be degraded or destroyed as
humans clear landscapes or change land - use patterns for developments Highways can divide
and fragment habitat, known as habitat fragmentation. Habitat fragmentation can limit the natural
range of organisms and create artificial interactions with humans and other orginisms ( deer
having to cross highways )
What are invasive species? - CORRECT ANSWER - are species that are not native to a
region are said to be nonnative or invasive. Not all nonnative species are invasive. Invasive
species can lead to significant economic and environmental harm, and many invasive species
have been introduced to an area by human activity.
what is over harvesting - CORRECT ANSWER - overfishing of a specific fish species is
overharvesting.
what is climate change - CORRECT ANSWER - changes in the climate can have profound
effects on organisms and threaten biodiversity in a region.
What are the worlds bioms - CORRECT ANSWER - Terrestrial or land, Freshwater
biomes, and Marine Biomes
what is terrestrial biom - CORRECT ANSWER - tropical rain forest, Savanna, Desert,
Temperate grassland, Deciduous Forest, coniferous forest ( also called Taiga)
what are the aquatic biomes - CORRECT ANSWER - Feshwater and marine
Freshwater Bioms - CORRECT ANSWER - Lakes and rivers comprise less then 2 percent
of the biosphere globally. They usually fall into two categories running or standing water.
Running water include streams and rivers
, marine biomes - CORRECT ANSWER - such as oceans make up more then 70% of the
biosphere
What are estuaries? - CORRECT ANSWER - regions where fresh water and salt water
mix
What is the biosphere? - CORRECT ANSWER - the part of Earth where life exists
What is the lithosphere? - CORRECT ANSWER - is the terrestrial component,
What is the hydroshpere? - CORRECT ANSWER - all the waters on the earth's surface,
such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
What is the atmosphere? - CORRECT ANSWER - e is the adjacent gaseous envelope of a
planet
What is osteopenia? - CORRECT ANSWER - Reduction in bone mass
What is osteoporosis? - CORRECT ANSWER - severe reduction in bone mass, it is a
disease characterized by low bone density and increases the fragility of bones and the risk of
bone fractures.
What is a chemical bond - CORRECT ANSWER - when elements join, their atoms are
held together. The electrons are the part of the atom that form bonds.
What is a ionic bond - CORRECT ANSWER - : involve one atom losing one or more
electrons and another atom gaining the electrons that were lost by the first atom. When atoms
form iconic bonds they lose or gain electrons to achieve stability.
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What are the Adaptations in Australopithecus Afarensi - CORRECT ANSWER -
Repositioned forearm magnum, Basin, Valgus angle at the knee, Non-Opposable big toe
what is the repositioned forearm magnum - CORRECT ANSWER - the spinal cord enters
the skill from the base rather then the back
what is a Basin - CORRECT ANSWER - Shaped pelvis: the pelvis supports and balances
the torso, serving as the body's center of gravity
what is Valgus angle at the knee - CORRECT ANSWER - the femurs point toward the
knees to shift the center of gravity more easily
what is Non-Opposable big toe - CORRECT ANSWER - the toes of the foot are in line to
efficiently direct downward force toward the ground.
what is alternation of generation in plants - CORRECT ANSWER - Plants have a life
cycle with two distinct stages, the GAMETOPHYTE stage and the SPOROPHYTE stage.
Cycling between theses two is known as alternation of generations. In the HAPLOID
GAMETOPHYTE stage, gametes which are reproductive cells, are produced through mitosis.
The male and female gametes fuse to form a diploid zygote, which then develops into the
sporophyte. The mature sporophyte produces spores through meiosis and the spores undergo
mitosis to produce the haploid gametophyte.
What is radial symmetry - CORRECT ANSWER - can be split into two identical halves by
drawing a plan through their longitudinal axis in more than one direction with their mouth
forming one end of this axis. ( jellyfish, anemones, corals, comb jellies, adult sea urchins and
starfish) animals have a top and bottom but not clear left or right or front or back
,What is Bilateral symmetry - CORRECT ANSWER - : can be divided into two mirrored
halves by a sagittal plane through their midline, splitting the animal into the left and right sides.
Bilaterally symmetric animals are usually polarized, having a head and Tail region, and are well
adapted for directional movement
What shape are bacillus bacteria - CORRECT ANSWER - Rod Shaped
What shape are coccus bacteria - CORRECT ANSWER - Ball Shaped
What shape are spirillum bacteria - CORRECT ANSWER - Long spiral shaped
What does blood consist of - CORRECT ANSWER - cells, cell fragments, and fluid called
plasma, which is yellow colored and makes up about 55 percent of human blood
what does blood plasma consist of - CORRECT ANSWER - Blood plasma contains water
and electrolytes, proteins, glucose, and lipids.
What are the most abundant cells in blood - CORRECT ANSWER - Red blood cells are
the most abundent cells in the blood they are also known as erythrocytes
what is white blood cells - CORRECT ANSWER - also known as leukocytes. White blood
cells have nuclei and don't contain hemoglobin and can live for years.
what are cell fragments - CORRECT ANSWER - platelets, also called thrombocytes
What do platelets do - CORRECT ANSWER - platelets help the blood clot to stop
bleeding wounds. Platelets are attracted to a wound activate each other and stick to the wall of
the blood vessel to form a platelet plug
What is the Baltimore Classification? - CORRECT ANSWER - Virus classification based
on nucleic acid genomes and replication type
,what is are biodiversity threats - CORRECT ANSWER - Habitat loss , Invasive Species,
over harvesting, and climate change
What is habitat loss - CORRECT ANSWER - : habitats can be degraded or destroyed as
humans clear landscapes or change land - use patterns for developments Highways can divide
and fragment habitat, known as habitat fragmentation. Habitat fragmentation can limit the natural
range of organisms and create artificial interactions with humans and other orginisms ( deer
having to cross highways )
What are invasive species? - CORRECT ANSWER - are species that are not native to a
region are said to be nonnative or invasive. Not all nonnative species are invasive. Invasive
species can lead to significant economic and environmental harm, and many invasive species
have been introduced to an area by human activity.
what is over harvesting - CORRECT ANSWER - overfishing of a specific fish species is
overharvesting.
what is climate change - CORRECT ANSWER - changes in the climate can have profound
effects on organisms and threaten biodiversity in a region.
What are the worlds bioms - CORRECT ANSWER - Terrestrial or land, Freshwater
biomes, and Marine Biomes
what is terrestrial biom - CORRECT ANSWER - tropical rain forest, Savanna, Desert,
Temperate grassland, Deciduous Forest, coniferous forest ( also called Taiga)
what are the aquatic biomes - CORRECT ANSWER - Feshwater and marine
Freshwater Bioms - CORRECT ANSWER - Lakes and rivers comprise less then 2 percent
of the biosphere globally. They usually fall into two categories running or standing water.
Running water include streams and rivers
, marine biomes - CORRECT ANSWER - such as oceans make up more then 70% of the
biosphere
What are estuaries? - CORRECT ANSWER - regions where fresh water and salt water
mix
What is the biosphere? - CORRECT ANSWER - the part of Earth where life exists
What is the lithosphere? - CORRECT ANSWER - is the terrestrial component,
What is the hydroshpere? - CORRECT ANSWER - all the waters on the earth's surface,
such as lakes and seas, and sometimes including water over the earth's surface, such as clouds.
What is the atmosphere? - CORRECT ANSWER - e is the adjacent gaseous envelope of a
planet
What is osteopenia? - CORRECT ANSWER - Reduction in bone mass
What is osteoporosis? - CORRECT ANSWER - severe reduction in bone mass, it is a
disease characterized by low bone density and increases the fragility of bones and the risk of
bone fractures.
What is a chemical bond - CORRECT ANSWER - when elements join, their atoms are
held together. The electrons are the part of the atom that form bonds.
What is a ionic bond - CORRECT ANSWER - : involve one atom losing one or more
electrons and another atom gaining the electrons that were lost by the first atom. When atoms
form iconic bonds they lose or gain electrons to achieve stability.
