(NCSU) | Ecology, Populations & Evolution
You are studying the color-changing Smith's dwarf chameleon (Bradypodion taeniabronchum),
and trying to get a handle on what is going on with their population fluctuations. For a few
years, the chameleon population seemed to be increasing, but the next few years the
population appeared to be decreasing. Upon closer examination, the data indicate that
population growth is most influenced by the
number of females in the group.
You are part of a research team tasked with coming-up with a plan to measure the total amount
of energy produced in a Sumatran (Indonesia) rainforest. This means that you will have to
figure-out how to measure.
a. primary productivity
Different species of Caribbean anoles consume the same prey.
Exploitative
Two species of sea snails, the small Siphonaria lessoni and the larger Fissurella crassa, once
competed for living quarters inside crevices. Although both species liked to burrow into cracks,
the heftier snails eventually edged out their diminutive opponents. The tinier organism was
forced to seek different shelter. This change negatively impacted the species, because the move
exposed them to a less hospitable environment. This lowered the reproductive rates of the
refugees. They eventually died off in certain area
Competitive Exclusion
Large aphids defend feeding sites on cottonwood leaves by kicking and shoving smaller aphids
from better sites.
interference
Give the specific name of an organism that is the most likely to have the least amount of total
energy available
tertiary consumers
Name one of the three main characteristics of a population that we covered together in class.
, size
dispersion
age structure
independent variable
the variable that is changed or controlled in a scientific experiment to test the effects on the
dependent variable
dependent variable
the variable being tested and measured in a scientific experiment.
Which of the following is the biological organization of hierarchical ordered complexity of life
that we will be covering in this course
Organism, population, ecosystem, biosphere
In class, the textbook, and on our PowerPoint, we learned that all organisms share the following
characteristics except which one? In other words, which of the following is not shared by all
organisms
Survival
Darwin's work on the Galapagos Islands led him to derive all of the following concepts, EXCEPT
Inheriting acquired characteristics
Our ancestors had much bigger jaws than we do, which helped them chew a tough diet, tear
apart meat, etc. Their teeth also wore down quickly. Wisdom teeth (third molars) grew later in
life, and helped our ancestors continue to eat. Today, ~35% of people are born without wisdom
teeth. This is an example of
evolution
Two members of the initial Amish migration to Pennsylvania in 1744 shared the recessive allele
for Ellis-van Creveld syndrome, which results in a long narrow chest and shortening of the limbs.
More Amish people have these traits than the surrounding non-Amish population.
founder effect
Alfred Russell Wallace
had the revolutionary idea of evolution by natural selection entirely independently of Charles
Darwin
A population that is infinitely large and in which mating is completely random is mostly likely to