IB Biology HL Questions And Answers
2023 Update A+
What are the characteristics common to all forms of life? - Answer-reproduction, carbon,
responds
... [Show More] to surroundings, Growth and Development, cellular organization, and energy
What are the levels of biological organization from simple to most complex? - AnswerMolecules, cell, tissue, organ, organism, population, community, ecosystem, biosphere
What are the 4 most common types of biological molecules? - Answer-Proteins, nucleic
acids, carbohydrates, and lipids
Organelle - Answer-any of a number of organized or specialized structures in a living
cell
Cell - Answer-The smallest structure and functional unit of an organism.
Tissue - Answer-The material of specialized cells and their products that make a wall of
cells and their products
Organ - Answer-a part of an organism that is self-contained and serves a function
Organism - Answer-an individual animal, plant, or single-celled life form
What are the similarities and differences of a population and an ecosystem? - 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? - 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? - Answer-DNA, cytoplasm, ribosome,
and plasma membranes
What is the definition of unicellular organisms? - Answer-an organism that consists only
of 1 cell eg. bacteria/microorganisms
What is the definition of multicellular organisms? - Answer-an organism that consists of
multiple cells eg. human
What are the similarities and differences between prokaryotic and - 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? - 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? - Answer-the production of a new living organism by
combining genetics of 2 different sexes/fusion of 2 gametes
What is asexual reproduction? - Answer-the reproduction of offspring without the fusion
of gametes.
How do Growth and Development differ? - Answer-Growth is the process of
Development, which is getting bigger/stronger/smarter
When consumers die, what gets nutrients and energy from the dead? - Answer-The
saprotrophs and detritivores
What is the definition of homeostasis and an example? - 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? - 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?" - AnswerResponse 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? - Answer-to adjust to the environment
What is the definition of anabolism? - Answer-constructive metabolism that synthesizes
more complex substances from simple substances
What is the definition of an atom? - Answer-The smallest unit of matter
What is the definition of autotroph? - Answer-any organism capable of self nourishment
to get energy
What is the definition of Biome? - Answer-a large naturally occuring community of fauna
and flora occupying that habitat
What is the definition of biosphere? - Answer-it is the part of the earth's crust, waters,
and atmosphere that support life
Continues... [Show Less]