Worksheetsexam 4
Total questions: 20
Worksheet time: 11mins
2 related frog species live in the same ponds. One species breeds in early spring, while the other breeds in late spring. Due to climate change, their breeding seasons overlap and they start to mate with each other. Their tadpoles rarely survive past a few days. Which two reproductive barriers does this scenario address?
a) Behavioral and temporal isolation
b) Temporal isolation and reduced hybrid fertility
c) Temporal isolation and reduced hybrid viability
d) Behavioral isolation and reduced hybrid fertility
2 species, A and B, occupy sandy and rocky coastlines respectively. After a storm physically combines A and B from both habitats, they both release their gametes into the water, but fertilization does not occur. Which two reproductive barriers does this scenario address?
a) Habitat isolation and reduced hybrid fertility
b) Gamete isolation and reduced hybrid viability
c) Behavioral isolation and reduced hybrid viability
d) Habitat and gamete isolation
One species of lizards lives on rocks and eat small plants, while another species of lizards lives on trees and eats insects. Which concept should be used to differentiate them as different species?
Ecological
Biological
Morphological
Phylogenetic
Fill in the blank: The interactions between biotic and abiotic systems occurs in an _____
Community
Ecosystem
Population
Landscape
Which of the following describes gene flow?
Some birds of species X living in Pittsburgh migrate to a Manhattan, which is inhabited by another population of species X
A natural disaster kills 80% of the deer population in PA
A group of birds of a population migrate to an island and start their own population there
2 populations of raccoons are separated by a mountain
Put the following ecological organizations in order of largest to smallest. More than one option may be correct.
Global-landscape-ecosystem-community-population-individual
Individual-population-community-ecosystem-landscape-global
Ecosystem-community-individual
Individual-population-global-landscape
Weather is _____ while climate is ____ over ___ years
Short term predictions related to sunlight, wind, temperature, etc. while climate is the average weather conditions for an area over 30 years
Short term predictions related to sunlight, wind, temperature, etc. while climate is the average weather conditions for an area over 100 years
the average conditions for an area over while climate is short term predictions related to sunlight, wind, temperature, etc over 50 years
the average conditions for an area over while climate is short term predictions related to sunlight, wind, temperature, etc over 30 years
A mountain separating two populations of squirrels results in 2 unique species over time. This is a result of ___
Allopatric speciation
Sympatric speciation
Gene flow
Mutations
The founder effect is ___ while the bottleneck effect is ____.
When a small group of individuals separate from a population; when a large population becomes a smaller population due to a natural disaster or other event
when a large population becomes a smaller population due to a natural disaster or other event; When a small group of individuals separate from a population
When a small group of individuals reproduce to make another species; when a few organisms die off and reduce population size
When a few organisms die off and reduce population size; when a small group of individuals reproduce to make another species
Which of the following reduces genetic variation?
Genetic drift
Gene flow
Mutations
Both gene mutations and genetic drift
The Africanized honey bee is a hybrid of the African honey bee and the European honey bee. They are known for being very aggressive. In Puerto Rico, however, the Africanized honeybees became less aggressive over time. Which of the following best explains this?
Genetic drift due to bottleneck
Directional selection from human interaction
Stabilizing selection for aggression
Mutation introducing a new aggression gene.
A population of lizards is introduced to an island that has no predators. Over several generations, the coloration of the lizards became less vibrant. Which of the following could be a reason why?
Disruptive selection
Bottleneck effect
Geneflow from mainland population
Directional selection due to environmental change
A certain species of plant is able to grow taller in more shaded environments. What concept does this demonstrate, and what advantage does this provide?
Mutation. It increases genetic diversity in the species
Natural Selection. It increases the fitness of the organism in its environment.
Phenotypic plasticity. It enables survival of the species in varied environments.
Speciation. It allows for the production of new species that live in this new environment.
In a population of butterflies, the brown ones are rare but have a much higher survival rate due to camouflage. Over time, however, the brown ones become more common. What type of selection does this demonstrate?
Negative frequency-dependent
Positive frequency-dependent
Stabilizing
Disruptive
Which of the following is an example of gamete isolation?
Two species of frogs breed in different seasons and never encounter each other.
A bird species only mates with others that sing a specific song
Interspecies mating occurs, but the sperm cannot fertilize the egg
A large insect cannot physically mate with a much smaller one due to a size mismatch
Katabatic winds happen A)____ where the wind travels B)_____ the mountain, becasue the air C)_____ and becomes D)______
A) during the day
B) up
C) heats up
D) lighter
A) at night
B) down
C) cools down
D) denser
A)during the day
B) down
C) heats up
D) denser
A) at night
B) up
C) cools down
D) lighter
Albedo is a measure of
the reflected solar radiation
the absorbed solar radiation
Which of the following is NOT a Mark-Recapture Assumption?
no mortality
no immigration/emigration
marks do not affect survival
only marked individuals are counted in n2
You conduct a Mark-Recapture Study in a 300m2 field. In the first sample, you find 20 mice and mark their tails. In the second sample, you find 12 marked out of 30 mice. Identify n1, n2, and M to calculate N and use N to find the population density in the field
n1 = 20
n2 = 30
M = 50
N = 12
pop. density = 25 mice per sq meter
n1 = 20
n2 = 30
M = 12
N = 50
pop. density = 0.167 mice per sq meter
Mice reproduce about every month. If the original population size in the field was 50, what would the population in the field look like after 1 year with a growth rate of 0.5
Nt = N0ert
~20,000
~80
~ 1000
~136
