Shared Flashcard Set

Details

Evolution: Evidence of Evolution (10.4, pg.318-318, 12.1)
Based on the McDougal Littell Biology Textbook
20
Biology
9th Grade
02/16/2010

Additional Biology Flashcards

 


 

Cards

Term
Most fossils are found in what type of rock?
Definition
Sedimentary
Term
What is a natural cast?
Definition
It is an impression left behind and filled in with minerals from water.
Term
What is permineralization?
Definition
When minerals in water form around hard structures (shells, bones, teeth)
Term
What are trace fossils?
Definition
They are a record of life activities (footprints, burrows)
Term
What is amber?
Definition
Tree sap that hardens to trap a creature.
Term
What are preserved remains?
Definition
Objects buried in ash, ice, or bogs
Term
If 14C has a half life of 5700 years, and there are 1000 atoms of 14c, how much 14c will be left after 11400 years?
Definition
250 atoms of 14C
Term
14C decays in 14N. If the ratio of 14C to 14N in one sample is 1:1 and in another sample is 1:3, which sample is older?
Definition
1:3
Term
What do missing link fossils do?
Definition
They show connections between groups of organisms. Example-archaeopteryx and basilosaurus Note: Archaeopteryx is pronounced Ar-kee-OP-ter-ix not Ar-kee-o-Ter-ix.... :)
Term
What are homologous structures and what leads to the creation of them?
Definition
Homologous structures are similar body structures with very different functions. Different environments lead these adaptations.
Term
What are vestigial structures?
Definition
They are organs which have lost most or all their original function. Example- wisdom teeth.
Term
True or false. The human, fish, reptile, and bird embryos in their very early stages are very different.
Definition
False. The embryos are very similar.
Term
What things are compared between species in biochemical evidence?
Definition
DNA, amino acids, and proteins.
Term
Similarities in embryo development indicates what?
Definition
That the organisms shared a common ancestor
Term
Due to antibiotic resistance, what is happening to bacteria and ease for treating bacteria?
Definition
The bacteria are not being affected by the antibiotics, and are therefore becoming harder to treat.
Term
What happens because of pesticide resistance?
Definition
Pests aren't affected by the pesticides, so they destroy the crops.
Term
The first life on Earth were?
Definition
Prokaryotes- Bacteria.
Term
True or false. Much evidence indicates life on Earth has common ancestors.
Definition
TRUE
Term
What is biogeography?
Definition
The study of the distribution of organisms around the world
Term
What are analogous structures?
Definition
Structures that perform a similar function but are not similar in origin. Example- Bat's wings and a fly's wings.
Supporting users have an ad free experience!