Which statement best describes one way humans maintain homeostasis.

Temperature is regulated by sweating.

The protein is part of a cell membrane. What is the most likely purpose of this protein?

It allows passage of particles into and out of the cell.

Which table of information correctly distinguishes between the statements?

1-theory 2-hypothesis 3-observation 4-inference

What must be transmitted to new DNA strands during replication to maintain genetic information?

the sequence of bases from existing DNA strands

Which provides the best evidence that these two species descended from a common ancestor.

the species' physical characteristics

For the aye-aye species, what is most likely the primary value of individuals living alone?

reduced competition for natural resources

Which statement best describes how the stiltgrass spread negatively affects native herbivores?

Stiltgrass reduces the size of the native plant populations.

Which statement best describes how antibiotics affect cellular respiration? Antibiotics...

interfere with the transport of materials

Choose the best answer.

Photosynthesis provides the materials that fuel cell resp

Which property of the carbon atom makes it an essential component of organic compounds?

Carbon can form four covalent bonds

Which statement explains why this technology most likely benefits farmers?

It increases the value of each acre of land cultivated.

Which statement best describes the event shown in the diagram?

Amino acid monomers are joining to form a macromolecule

Which characteristic is shared by all prokaryotic and eukaryotic organisms?

the need for a source of energy

Which description is the best example of a population?

all of the red foxes in a forest

Which statement best describes how active transport differs from passive transport?

Only active transport requires ATP.

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Keystone Biology Review

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A #review for the #PAKeystoneBiologyExam.

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Questions 26

Answers

1
Which mechanism most likely caused the development of the new species?
habitat preference
increased gene flow
geographic isolation
behavioral isolation
2
The simplest level of biological organization at which a structure can support life.
organelle
organ system
tissue
cell
3
Which statement best describes one way humans maintain homeostasis.
Water content is regulated by sweating.
Temperature is regulated by giving off carbon dioxide.
Water content is regulated by giving off carbon dioxide.
Temperature is regulated by sweating.
4
Which type of mutation could have produced this type of error in the protein?
silent
substitution
nonsense
frame-shift
5
What role do the ATP molecules play in the protein synthesis process?
They provide energy.
They convert energy into heredity information.
They absorb excess energy to prevent overheating.
They increase activation energy.
6
The protein is part of a cell membrane. What is the most likely purpose of this protein?
It manufactures phospholipids to repair membrane damage.
It attracts unbalanced charges in the cell's environment.
It releases stored chemical energy in membrane carbohydrates
It allows passage of particles into and out of the cell.
7
Which energy transfer most likely occurs between organisms in the food web?
from owl to fox
from rabbit to fox
from sparrow to grass
from mouse to grasshopper
8
Which table of information correctly distinguishes between the statements?
1-observation 2-inference 3-fact 4-hypothesis
1-theory 2-hypothesis 3-observation 4-inference
1-inference 2-observation 3-theory 4-fact
1-fact 2-theory 3-hypothesis 4-observation
9
The function of which human organ is most like the cell walls of bacteria?
liver
heart
skin
pancreas
10
What must be transmitted to new DNA strands during replication to maintain genetic information?
individual sugars from existing DNA strands
the sequence of bases from existing DNA strands
the sequence of phosphates from existing DNA strands
individual atoms from existing DNA strands
11
Which provides the best evidence that these two species descended from a common ancestor.
the species' shared habitat
the species' physical characteristics
the species' similar diets
the species' mating behaviors
12
Which effect is most likely caused by nondisjunction during meiosis?
only two types of nitrogenous bases
an extra chromosome
an increase in nuclei
increased survival benefits from traits
13
Which location would most likely have a population with the greatest variation in alleles?
location 3
location 1
location 2
location 4
14
For the aye-aye species, what is most likely the primary value of individuals living alone?
greater genetic variability within the species
decreased space needs for the species
reduced competition for natural resources
increased survival rates with habitat loss
15
Which statement best describes how the stiltgrass spread negatively affects native herbivores?
Stiltgrass attracts other nonnative plants to the forest
Stiltgrass reduces the size of the native plant populations.
Stiltgrass stops the life cycles of native herbivores.
Stiltgrass increases the energy flow through the ecosystem
16
Which statement best describes how antibiotics affect cellular respiration? Antibiotics...
increase the rate of DNA replication by forming nucleotides
decrease the rate of cell respiration by producing oxygen
remove chloroplasts from plant cells to cause starvation
interfere with the transport of materials
17
Which structure allows plants to perform this function?
nucleus
chloroplast
vacuole
mitochondrion
18
Choose the best answer.
Photosynthesis provides the materials that fuel cell resp
Photosynthesis absorbs excess energy produced by cell resp
Photosynthesis absorbs materials catalyzed during cell resp
Photosynthesis is one of the final steps in cell respiration
19
Which property of the carbon atom makes it an essential component of organic compounds?
Carbon can form four covalent bonds
Carbon is a solid at room temperature
Carbon is a nonmental
Carbon oxidizes to form carbon dioxide
20
Which statement explains why this technology most likely benefits farmers?
It lowers the cost of each acre of plants cultivated.
It eliminates the processing needed to extract plant oils.
It increases the value of each acre of land cultivated.
It makes each plant more resistant to disease.
21
Which property of water makes this movement possible?
cohesion
freezing point
high specific heat
temperature-dependent density
22
Which statement best describes the event shown in the diagram?
Glucose is being synthesized in the chloroplast
Amino acid monomers are joining to form a macromolecule
A polymer is being broken down into monomer subunits
Lipid molecules are forming fatty acid chains
23
Which characteristic for eye color would be the same for both individuals?
the allele
the amount of pigment
the location of the gene
the DNA sequence
24
Which characteristic is shared by all prokaryotic and eukaryotic organisms?
the ability to make their own food
the need for a source of energy
the ability to reproduce sexually
the need for oxygen for respiration
25
Which description is the best example of a population?
all of the red foxes in every forest
all of the organisms in a forest
all of the organisms in every forest
all of the red foxes in a forest
26
Which statement best describes how active transport differs from passive transport?
Only active transport requires ATP.
Only active transport allows substances to leave a cell.
Only active transport relies on a plasma membrane.
Only active transport moves small particles.

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