1. Which of the following describes a property of water?Answer a) more dense as

Question

1. Which of the following describes a property of water?Answer
a) more dense as a solid
b) changes temperature rapidly
c) dissolves many chemicals necessary for life
d) noncohesive
e) high pH

2. The major pathways that water moves through the cycle are ________.Amswer
a) extraction and groundwater
b) transpiration and runoff
c) precipitation and evaporation
d) condensation and electrolysis
e) precipitation and infiltration


3. Population distribution describes the ________.Answer
a) spatial arrangement of individuals of a single species within a particular area
b) spatial arrangement of multiple species within a particular area
c) specific environment in which an organism lives
d) relative numbers of organisms of each age within a population
e) number of individuals within a population per unit area


4. Extinction is ________.Answer caused exclusively by human disturbance
the loss of communities from ecosystems
proceeding more slowly in 2009 than at any time in the past
most likely to affect wide-ranging generalist species
a natural process and the ultimate fate of all species

5. Approximately ________ species are thought to presently inhabit Earth.Answer
1 million
1 billion
500,000
1.5-100 million
1,000-100,000

6. The spatial arrangement of organisms within an area is termed population ________.Answer
ecology
dispersion
selection
density
size

7. Selective breeding of dogs and agricultural crops is best described as ________.Answer
artificial selection
phylogenetics
biological diversity
genetic mutation
natural selection


8. Groups of organisms with low biotic potential ________.Answer
are density-independent organisms
have slowly growing populations
are r-strategists
are K-strategists
include the golden toads of Monteverde and many species of frogs

9. Allopatric speciation describes ________.Answer
the convergence of two similar populations
the global spread of human populations
speciation due to the spread of genetic mutations
speciation due to physical separation of populations
a rare type of natural selection

10. Endemic species ________.Answer
cause disease
are generalists
are only found in one place on the planet
are invasive species that cause extinction
have high rates of mutations that lead to large numbers of offspring

Explanation / Answer

1. C ---> water is known as the universal solvent, and almost all crucial life reactions take place in water. 2. C--> water turns to gas, (clouds), condenses in the sky, and falls back as rain water. 3. D---> it shows the range from youngest to oldest, and usually resembles a bell-shaped curve. 4. the ultimate fate of all species ---> environments change over time, and usually more quickly before species can adapt. 5. 1.5 to 100 million ---> more are discovered daily, and others die daily. 6. dispersion--- > i.e how they are spaced relative to each other/spread out through the area. 7. artificial selection---> we picked what we liked about the species, and bred them accordingly, to get those traits in their offspring. 8. slowly growing populations ---> biotic potential means being able to reproduce quickly and in large numbers. 9. separation due to genes--- > think "allo" in "allele"! 10. found only on one place in the planet---> endemic = native to.

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