Structure & Function
this organelle controls cell activities and houses DNA
nucleus
true or false: an organisms entire genome (full set of DNA) is present in every single cell
true
this natural process ensures that favorable traits are passed down over generations
natural selection
these organisms are found at the bottom of a food pyramid and account for most of the biomass in an ecosystem
producers
errors in DNA replication resulting from genetic or environmental pressures (these create genetic variation)
mutations
this molecule is produced by plants in photosynthesis and allows for life processes to be carried out
glucose
the macromolecule produced by a sequence of amino acids
a protein
a trait or behavior that helps an organism survive
adaptation
energy is lost as you move in this direction on a food pyramid
moving up
in experimental design this variable provides an observer with data
dependent variable
this rigid, structural organelle is found in all plant cells, but not animal cells
cell wall
this process occurs when body cells replicate and divide into exact copies for growth and repair
mitosis
evidence of past life on Earth is studied through this
fossil record
in this symbiotic relationship both organisms benefit
mutualism
this is achieved when an organism returns to their normal functioning through a positive or negative feedback cycle
homeostasis
this molecule is synthesized during cellular respiration and is C02's product counterpart
ATP
this process occurs in meiosis, where DNA from both parents recombine, making genetically distinct offspring
crossing over
common ancestor
this is a type of organism which is nonnative, and rapidly takes over new environments
invasive species
an organism which breaks down and recycles dead, organic material in an ecosystem
decomposer
photosynthesis occurs in this organelle
chloroplast
these 4 base pairs transcribe when DNA becomes RNA
A - U C - G
simple organisms like bacteria lack a nucleus and evolved before more complex organisms such as plants/animals whose cells do contain nuclei, name both organism types
prokaryotes & eukaryotes
a single species which sustains the health of an entire ecosystem with its presence
keystone species
the movement of a liquid or gas from areas of high to low concentration
diffusion