IB Biology HL Written Exam Questions & Answers.
What are the characteristics common to all forms of life? - CORRECT ANSWER reproduction, carbon, responds to surroundings, Growth and Development, cellular organization, and energy
What are the levels of biological organization from simple to ...
What are the characteristics common to all forms of life? - CORRECT ANSWER reproduction, carbon,
responds to surroundings, Growth and Development, cellular organization, and energy
What are the levels of biological organization from simple to most complex? - CORRECT ANSWER
Molecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere
What are the 4 most common types of biological molecules? - CORRECT ANSWER Proteins, nucleic acids,
carbohydrates, and lipids
Organelle - CORRECT ANSWER any of a number of organized or specialized structures in a living cell
Cell - CORRECT ANSWER The smallest structure and functional unit of an organism.
Tissue - CORRECT ANSWER The material of specialized cells and their products that make a wall of cells
and their products
Organ - CORRECT ANSWER a part of an organism that is self-contained and serves a function
Organism - CORRECT ANSWER an individual animal, plant, or single-celled life form
What are the similarities and differences of a population and an ecosystem? - CORRECT ANSWER a
population and ecosystem both include organisms, however a population is one type of species while an
ecosystem is both biotic and abiotic things.
What is the definition of emergent properties? - CORRECT ANSWER the feature that can't be directly
from the features of its simpler parts eg. the taste of salt w/ the combination of Na+Cl
,What are the 4 shared characteristics of cells? - CORRECT ANSWER DNA, cytoplasm, ribosome, and
plasma membranes
What is the definition of unicellular organisms? - CORRECT ANSWER an organism that consists only of 1
cell eg. bacteria/microorganisms
What is the definition of multicellular organisms? - CORRECT ANSWER an organism that consists of
multiple cells eg. human
What are the similarities and differences between prokaryotic and - CORRECT ANSWER eukaryotic cells?
Prokaryotic cells have no nuclei, unlike Eukaryotic cells. Both are enclosed by membranes and have DNA.
Prokaryotic cells have no independent organelles, except for the organelle of ribosome
How do the cells in multicellular organisms become specialized? - CORRECT ANSWER By controlling what
DNA is expressed in one cell, because all of the cells in an organism have the same DNA, but only
express some. This might include how tight the bindings of the protein are, and if protein is made what
the microRNAs do
What is sexual reproduction? - CORRECT ANSWER the production of a new living organism by combining
genetics of 2 different sexes/fusion of 2 gametes
What is asexual reproduction? - CORRECT ANSWER the reproduction of offspring without the fusion of
gametes.
How do Growth and Development differ? - CORRECT ANSWER Growth is the process of Development,
which is getting bigger/stronger/smarter
When consumers die, what gets nutrients and energy from the dead? - CORRECT ANSWER The
saprotrophs and detritivores
What is the definition of homeostasis and an example? - CORRECT ANSWER The ability or tendency of an
organism or cell to maintain internal equilibrium by adjusting its physical processes. eg. body
temperature in mammals
,What is the definition of metabolism? - CORRECT ANSWER The chemical processes in living organisms in
order to maintain life. eg. the mammal's body metabolism can change the need and absorption of
energy, depending on environment
How does "response to environment" differ from "adaptation to environment?" - CORRECT ANSWER
Response involves the behavior that results from the environment, while adaptation is how structures
or functions of an organism change in order to better survive in the environment.
What is the definition of adapt? - CORRECT ANSWER to adjust to the environment
What is the definition of anabolism? - CORRECT ANSWER constructive metabolism that synthesizes more
complex substances from simple substances
What is the definition of an atom? - CORRECT ANSWER The smallest unit of matter
What is the definition of autotroph? - CORRECT ANSWER any organism capable of self nourishment to
get energy
What is the definition of Biome? - CORRECT ANSWER a large naturally occuring community of fauna and
flora occupying that habitat
What is the definition of biosphere? - CORRECT ANSWER it is the part of the earth's crust, waters, and
atmosphere that support life
What is the definition of catabolism? - CORRECT ANSWER the metabolism breaking down complex into
simple substances with the release of energy
What is the definition of cell? - CORRECT ANSWER the smallest functioning structure of living matter
What is the definition of cell membrane? - CORRECT ANSWER The semipermeable membrane enclosing
the cytoplasm of a cell
, What is the definition of community? - CORRECT ANSWER a set of species found in the same place at the
same time
What is the definition of cytoplasm? - CORRECT ANSWER The cell substance between cell membrane
and nucleus
What is the definition of detritivore? - CORRECT ANSWER an organism that uses organic waste as a food
source
What is the definition of differentiation? - CORRECT ANSWER process by which cells or tissues
change/specialize in development
What is an electron? - CORRECT ANSWER an elementary particle having negative charge and exists
outside of the nucleus (electron cloud)
What is evolution? - CORRECT ANSWER process how different living organisms developed and diversified
What is growth? - CORRECT ANSWER increasing in amount or complexity
What is a heterotroph? - CORRECT ANSWER organism deriving nutrients from complex organic
substances
What is a molecule? - CORRECT ANSWER a group of atoms bonded together
What is a neutron? - CORRECT ANSWER a neutrally charged ion inside the nucleus with proton
What is organization? - CORRECT ANSWER organic structure or compositions
What is a proton? - CORRECT ANSWER A positive ion in the nucleus with a neutron
What are ribosomes? - CORRECT ANSWER tiny mitten-shaped organelles that manufacture proteins
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