What is the answer for the biology questions?
1 Organisms need nutrients in order to
A utilize hydrogen and oxygen
B carry out essential life functions
C recycle chemical compounds
D carry out nitrogen fixation
2 Cool air over the poles will
A rise
B sink
C absorb heat from the equator
D flow parallel to Earths surface
3 The series of predictable changes that occur in a community over time is called
A recombination
B ecological succession
C climax community
D climate change
4 The change of sequence of DNA is called a
A recombination
B polygenic trait
C single-gene trait
D mutation
5 Natural selection acts directly on
A alleles
B genes
C phenotypes
D mutations
6 Which of the following is NOT a way in which natural selection affects the distribution of phenotypes?
A directional selection
B stabilizing selection
C disruptive selection
D chance events
7 In genetic drift allele frequencies change because of
A mutation
B chance
C natural selection
D genetic equilibrium
8The separation of populations by barriers such as rivers, mountains or bodies of water is called
A temporal isolation
B geographic isolation
C behavioral isolation
D genetic equilibrium
9Most fossils form in
A rusty water
B volcanic rock
C sedimentary rock
D the sap of ancient trees
If you dont want to help please dont write if you only want to help as many as you know??
2 Responses
binosawr me
08 Feb 2010
jasmine c
08 Feb 2010
1. b
2.?
3. b
4. d
5. a
6. a or d
7. c
8. b
9. c
1. B
2. B
3. it could be B or C
4. D
5. C
6. D
7. C
8. B
9. C
Note for #3: its possible to record temperature frequencies on the environment. ecological succesion are gradual long term changes in ecosystems; you can expect what would it look like to a newly formed island due to a volcanic eruption 200 years later… (more trees)
Info for #5: Since there are 2 conflicting answers to this, Ill explain why… natural selection acts on phenotypes because the trait you express (phenotype) determines whether its successful to keep you surviving. Most commonly mistaken is that your genes DO NOT change to adapt to the environment, it simplys die out if it is not favorable enough..