ANSWERS (GRADED A+)
True or False
Mark and recapture would be the better method for estimating the number of
saguaros in a population - ANSWERFalse
True or False
Sampling Quadrats would be a better method for estimating the number of whales in
a population - ANSWERFalse
True or False
A climate envelop model uses a fundamental niche to predict the distribution of a
species - ANSWERFalse
True or False(Pythons)
The native range of pythons likely excludes areas in which freezing temperatures will
occur in the winter - ANSWERTrue
True or False
To test the hypothesis that greenhouse gases cause global warming, we need to
replicate the observations of warming on Earth by study of multiple planets -
ANSWERTrue
True or False
When two variables are correlated, an increase in one variable does not necessarily
cause an increase in the other variable - ANSWERTrue
True or False (Whales)
The growing population in 1985 and 1995 could have resulted from a decrease in
emigration or an increase in immigration - ANSWERTrue
True or False(Whales)
The shrinking population between 1965 and 1970 could have resulted from a
decrease in birth rate or an increase in the death rate - ANSWERTrue
True or False(Tree lizards)
The two species coexist by spatially partitioning their environment - ANSWERTrue
True or False(Tree Lizards)
Canyon lizards limit the fundamental niche of tree lizards - ANSWERFalse
True or False
, More solar radiation and more precipitation would likely result in more energy from
carnivores - ANSWERTrue
True or False
If productivity enhances diversity, one should see more species in deep tropical
waters, than along shallow coast lines - ANSWERFalse
True or False
Greater productivity could support more individuals of a species without supporting
more species - ANSWERTrue
True or False(Biodiversity)
The greatest density of species occurs at the north pole - ANSWERFalse
True or False(Tree lizards)
Tree lizards limit the realized niche of canyon lizards - ANSWERTrue
True or False(Tree lizards)
Tree lizards likely compete with canyon lizards - ANSWERTrue
True or False(Tree lizards)
The number of replicates for each treatment equals the total number of lizards on
both plots - ANSWERFalse
True or False
A realized niche is usually larger than a fundamental niche - ANSWERFalse
True or False
The rate of population growth (r) determines whether a species can persist during
competition - ANSWERFalse
True or False
If two separate species compete, neither species will reach its carrying capacity
before one species goes extinct - ANSWERTrue
True or False
When two species have different niches the competition coefficients ( alpha and
beta) are likely to be less than 1.0 - ANSWERTrue
True or False
The larger the competitive effect of a species(alpha or beta), the more likely the
species will persist during competition - ANSWERFalse
True or False
The model of competition between species can ignore competition with in species -
ANSWERFalse
True or False (Whale Exp)