BCOT parts 2 and 3
What's affected by a disturbance
Living and nonliving organisms
Difference between natural and artifical selection
Natural happens by nature and naturally whereas artifical happens by human force
The only nonrandom cause of evolution
Natural selection
Abiotic factors
Nonliving components of environment
What is least likely to be an example of a variation within a species?
Number of limbs
Allele frequency
Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
Mongolian gerbils are prey for hawks. If a wildfire blackens the landscape how will the frequency of the a allele for black fur color change compared to the A allele for brown fur color?
The a allele for black fur color will increase compared to the A allele for brown fur color.
What does evolution cause
The adaptations of a population to its environment and to the diversity of life on Earth
In the phrase "survival of the fittest", the term "Fittest" refers to...
The best adapted organism
A change to any part of an ecosystem may disrupt the flow of energy and matter.
True
Each level of organization (organisms, population, community) gets more complex as more of the environment is considered.
True
How quickly an ecosystem can recover depends on the type and serverity of the disturbance.
True
Natural selection is the only nonrandom cause of evolution.
True
The higher percentage of tuskless elephants after the Mozambique civil war is best explained by natural selection.
True
The living pares of an ecosystem interact with each other and with nonliving parts. Because of these interactions, ecosystems are dynamic- meanng they are always changing.
True
The playground at Attea Middle School should be considered an ecosystem
True
What is the best explanation for the high percentage of tusks in the elephant population?
Tusks help elephants survive and reproduce
What best explains the high percentage of elephants without tusks in the population after the civil war?
Tusks were sold for their ivory to raise money to buy weapons.
which of the following could be an ecosystem disturbance
Volcanic Eruptions, wildfires, oil spills, clear cutting of trees, and increase of an insect swarm
Which of the following items can be found in an ecosystem?
Water, Rocks, Plants, and Animals
In which of the following situations is a population most likely to become extinct?
When an enviromental change is rapid and the population is unable to adapt to the changes over a few generations.
In order for natural selection to occur, certain conditions must be present in a population. Which of the following is NOT one of the necessary conditions for natural selection to occur?
the ability of an organism to adapt
The beaks of finches found on various Galapagos Islands varied based on...
the available food supply
genetic diversity
the variety of genes within a given species
What is ecological diversity
the variety of habitats, niches, trophic levels, and community interactions
Which of the following are mentioned in the video to explain why humans began to breed dogs?
to help them herd their cattle and to help with hunting
Ecosystem
A biological community of interacting organisms and their physical environment.
Which of the following is an example of artificial selection?
A farmer only plants seeds from the largest plants in his crop.
Which of the following is an example of an environmental pressure?
A lake that's gradually running out of water
Monkey flowers are found in a variety of colors ranging from white to pink to red. Animals such as bees and hummingbirds help these plants reproduce by transferring pollen as they travel from flower to flower. Hummingbirds prefer red flowers. Bumblebees prefer pink flowers. Which population distribution of hummingbirds and bumblees would you expect to find if there were mostly pink monkey flowers in one area? a. A large population of hummingbirds and a few bumblebees.
A large population of bumblebees and a few hummingbirds.
What is a community
All the different populations that live together in an area
Biotic factors
All the living organisms that inhabit an environment
What is a common ancestor?
An animal from which two or more different species evolved
What is an ecosystem disturbance?
An ecosystem disturbance is when a change in environmental conditions causes a change in the ecosystem
Genotype
An organism's genetic makeup, or allele combinations.
Phenotype
An organism's physical appearance, or visible traits.
artificial selection
Breeding organisms with specific traits in order to produce offspring with identical traits
Evolution
Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.
What are some ways that humans disturb ecosystems?
Deforestastion, fires, and oil spills
The concepts of the theory of evolution
Descent of modification, common descent, and natraul selection
Alleles
Different forms of the same gene
What is ecosystem stability
Factors stay more or less within a certain range and in a mostly stable condition, even as individual parts change
Dogs closest common ancestor are domestic cats
False
How can evolution occur
Genetic variation
What does HIPPO mean
Habitat loss, invasive species, population, pollution, overharvesting
When is adaptation possible
When genetic variation provides a variety of traits in the population
Can you take a gene from a fish and put it into a tomato?
Yes
Is bacteria alive
Yes
Which statement best describes an example of low species diversity?
a marsh ecosystem is covered by a single species of cattail bulrushes
What is NOT one of the necessary conditions for natural selection to occur?
a trait that provides an advantage or disadvantage for survival
When humans play a role in the traits a population of animals have this is called
artificial selection
Variation
differences in traits of organisms in a population
What is necessary for evolution to occur?
genetic variation and genetic mutation
Population
group of individuals of the same species that live in the same area
Single organism
individual
What does a change to an ecosystem do
may disrupt the flow of energy and matter