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Life Science
Test April
35
Science
7th Grade
04/13/2011

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Cards

Term
An organism from which others have descended from 
Definition
Ancestor 
Term
The entire female part of a flower
Definition
Pistil
Term
A random change in a gene
Definition
Mutation 
Term
Can be used to determine how closely related species are 
Definition
DNA
Term
This holds the anthers
Definition
Filament
Term
Another name for eggs in a flower
Definition
Ovules
Term
Occurs when two organisms eat the same food source in a small area 
Definition
Competition 
Term
Remains of organisms 
Definition
Fossils
Term
An inherited trait that helps an organism survive. 
Definition
Adaptation 
Term
A species that no longer exists. 
Definition
Extinction
Term
Went on the voyage of the beagle and wrote the origin of the species
Definition
Darwin (Charles Darwin)
Term
Said that the population of organisms tend to gros faster than the food supply.
Definition
Malthus 
Term
Something that attracts pollinators to flowers
Definition
Smell or Color
Term
The process of how organisms acquire adaptions over time
Definition
evolution
Term
Had a drastic color change during the industrial revolution
Definition
Moths
Term
Occurs when the pollen touches the stigma of a flower, usually done by bees
Definition
Pollination
Term
Covers the flower bud before it blooms
Definition
Sepal
Term
Evolution
Definition
The process of how organisms aquire adaptions over time
Term
Adaptation 
Definition
An inherited trait that helps an organisms survive
Term
Ancestor 
Definition
An organism from which others have descended 
Term
Cladogram 
Definition
A tree like diagram that displays evolutionary relationships among living species and their ancestors 
Term
Homologous structures 
Definition
Baby structures that have a common orgin but don't necessarily perform the same function 
Term
Vertebrates
Definition
Animals with a back bone
Term
Fossil
Definition
A remnant or trace of an organism from the past, such as a skeleton or leaf imprint, embedded and preserved in Earth's crust
Term
Fossil Record 
Definition
A historical sequence of life on earth based on the sequence of fossils 
Term
Natural selection 
Definition
The process by which organisms with favorable adaptations survive and reproduce 
Term
Genetic Variation
Definition
The variety of alleles in a population
Term
Extinction
Definition
Occurs when the environment changes and the adaptations of a species are no longer sufficient 
Term
As environmental conditions change over time, which population will have better chance of survival?
Definition
A population with a high level of variation
Term
In trying to understand the evolutionary relationships between 2 species which would not be helpful?
Definition
Comparative analysis of dental impressions shows similarities in number and structure of each tooth. 
Term
Which statement best describes adaptation?
Definition
A beetle hatches in time of food shortage with a mutation that contains enzymes to digest a greater variety of food.
Term
The size of a white footed mouse population is influenced by?
Definition
Availability of acorns increase in primary preditor and an extremely dry summer leading to a severe drought. 
Term
What is variation?
Definition
It happens by chance and is passed on to offspring. 
Term
What is mutations?
Definition
It occurs due changed in the environment. 
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