Biology Keystone Final Test Questions
And 100% Correct Answers 2025-2026
Updated.
Abiotic - Answer A nonliving thing in an ecosystem
Active Transport - Answer The movement of particles from an area of low concentration
across a membrane to an area of high concentration, using ATP as an energy source, to build up
a concentration gradient
Adenosine Triphosphate (ATP) - Answer A small, soluble molecule that provides energy for
reactions throughout the cell; ATP releases energy when a phosphate bond is broken
Adhesion - Answer The tendency of water molecules to stick to other surfaces
Allele - Answer A version of a gene due to a variation in the nucleotide sequence
Allele Frequency - Answer How often an allele occurs in a population, its relative frequency
Analogous Structures - Answer Structures in different organisms that have the same function
but are different in form and inheritance
Aquatic - Answer Associated with water
Biogeochemical Cycles - Answer The movement of abiotic factors such as carbon, oxygen,
nitrogen, and water between living and nonliving parts of an ecosystem
Biome - Answer The similar ecosystems of a large geographic area with species adapted to
that environment
Biosphere - Answer The ecosystem of the planet Earth, made up of all biomes
Biotic - Answer A living or once-living thing in an ecosytem
Carbohydrate - Answer A macromolecule made of carbon, hydrogen, and oxygen that cells
use for energy
, Catalyst - Answer A substance that speeds up a chemical reaction without being changed
itself
Cell - Answer The basic unit of life
Cell Cycle - Answer The stages of a cell's life leading to division and duplication; interphase,
nuclear division, and cytokinesis
Cellular Respiration - Answer A process that breaks down organic molecules such as glucose
and captures the released energy in ATP
Chloroplast - Answer An organelle in plant cells that captures sunlight and transforms it to
chemical energy
Chromosome - Answer A single piece of DNA, made up of genes
Cloning - Answer The practice of reproducing an organism that is genetically identical to the
original
Co-dominance - Answer A type of inheritance in which two alleles representing homozygous
phenotypes are equally expressed
Cohesion - Answer The tendency of water molecules to stick to each other
Community - Answer The populations of different species that inhabit a particular area
Competition - Answer When two organisms or species compete for limited resources, such
as territory, food, water, or mates in the same enviroment
Concentration - Answer The amount of a substance, the solute, dissolved in a given volume
of water or another substance, the solvent
Concentration Gradient - Answer A gradual difference in the concentration of a substance in
a solution as a function of distance
Consumer - Answer An organism that gets its energy by feeding on other organisms
And 100% Correct Answers 2025-2026
Updated.
Abiotic - Answer A nonliving thing in an ecosystem
Active Transport - Answer The movement of particles from an area of low concentration
across a membrane to an area of high concentration, using ATP as an energy source, to build up
a concentration gradient
Adenosine Triphosphate (ATP) - Answer A small, soluble molecule that provides energy for
reactions throughout the cell; ATP releases energy when a phosphate bond is broken
Adhesion - Answer The tendency of water molecules to stick to other surfaces
Allele - Answer A version of a gene due to a variation in the nucleotide sequence
Allele Frequency - Answer How often an allele occurs in a population, its relative frequency
Analogous Structures - Answer Structures in different organisms that have the same function
but are different in form and inheritance
Aquatic - Answer Associated with water
Biogeochemical Cycles - Answer The movement of abiotic factors such as carbon, oxygen,
nitrogen, and water between living and nonliving parts of an ecosystem
Biome - Answer The similar ecosystems of a large geographic area with species adapted to
that environment
Biosphere - Answer The ecosystem of the planet Earth, made up of all biomes
Biotic - Answer A living or once-living thing in an ecosytem
Carbohydrate - Answer A macromolecule made of carbon, hydrogen, and oxygen that cells
use for energy
, Catalyst - Answer A substance that speeds up a chemical reaction without being changed
itself
Cell - Answer The basic unit of life
Cell Cycle - Answer The stages of a cell's life leading to division and duplication; interphase,
nuclear division, and cytokinesis
Cellular Respiration - Answer A process that breaks down organic molecules such as glucose
and captures the released energy in ATP
Chloroplast - Answer An organelle in plant cells that captures sunlight and transforms it to
chemical energy
Chromosome - Answer A single piece of DNA, made up of genes
Cloning - Answer The practice of reproducing an organism that is genetically identical to the
original
Co-dominance - Answer A type of inheritance in which two alleles representing homozygous
phenotypes are equally expressed
Cohesion - Answer The tendency of water molecules to stick to each other
Community - Answer The populations of different species that inhabit a particular area
Competition - Answer When two organisms or species compete for limited resources, such
as territory, food, water, or mates in the same enviroment
Concentration - Answer The amount of a substance, the solute, dissolved in a given volume
of water or another substance, the solvent
Concentration Gradient - Answer A gradual difference in the concentration of a substance in
a solution as a function of distance
Consumer - Answer An organism that gets its energy by feeding on other organisms
