http://fossilworks.org/bridge.pl? on number 1)
5) Most organisms die and decompose without leaving any fossil remains.
Others are ok.
I need my answers checked, thanks!
1 New fossils are constantly being discovered and new stories about Earth's history are emerging. The millions of fossils that scientists have collected are documented in the fossil
library
architecture
record*****
data base
2 Scientists use fossils that have been found and compare homologous structures, vestigial structures, and DNA sequences among different organisms. From these comparisons, scientists learned that species with similar development patterns and body structures had a common
environment
predator
gene***
ancestor(if they were ancestors they would use their structures the same way, like a whale and a cat have similar structure but use their bones/structure differently)
3 If you are sick with a bacterial infection, your doctor may prescribe an antibiotic to kill the infection. However, over time some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this?
The antibiotic mutated to an ineffective form.
The antibiotic mutated the bacteria, which allowed resistance to develop.
Individual bacteria acquired the ability to resist the antibiotic and passed on the resistance to the offspring.
Genetic variation in bacteria made it possible for some bacteria to have resistance to the antibiotic. They survived, reproduced, and passed on the resistance to the offspring.******
4 Fossilized animal scat (poop) is an example of which type of fossil
cast fossil
body fossil
trace fossil****
mold fossil
5 The fossil record is incomplete and does not contain all of the Earth's past organisms. Why have some organisms been found as fossils while others have not?
Fossils only exist for organisms that had shells or hard outer body coverings.*****
Most organisms die and decompose without leaving any fossil remains.
Fossils only exist for organisms that lived over 3 million years ago.
Only very large organisms have enough body mass to result in fossil formation.
6 How does natural selection lead to the evolution of a species?
Conditions in the environment reduce competition for resources within a species.
Environmental changes favor weaker members of the species.
Overproduction provides food for stronger members of the species.
Advantageous traits accumulate among surviving members of the species******
1 answer