Born with it!
Survival of the Fittest
Big Mouths
Why it look like that?
TBT
Could be anything
100
What is the difference between a dominant and a recessive allele?
A dominant allele masks the effect of a recessive one.
The trait from the dominant allele is expressed if at least one copy is present.
100
What is natural selection?
A process in which organisms better adapted (have traits that give an advantage) to their environment survive and reproduce more successfully.
100
What is an invasive species?
!! DOUBLE !! (200!!)
Name three invasive species here in the USVI?
A non-native species that spreads rapidly and harms the environment, economy, or human health.
Invasives : LIONFISH!! cat, dog, livestock, rats, kudzu vine, mongoose, snakes (boas, pet snakes)...
100
What is the biological definition of a species?
A group of organisms that can interbreed and produce fertile offspring.
100
What are 4 of the 8 characteristics of life?
!! DOUBLE !! (200)
What are all 8?
Made of cells, reproduce, grow and develop, use energy, respond to environment, maintain homeostasis, have DNA, evolve.
100
What is the name of the woman whose "immortal cells" launched a biotechnological revolution?
200
What are the possible genotype(s) of an organism with a dominant phenotype?
Homozygous dominant (AA) or heterozygous (Aa).
200
What does "descent with modification" mean?
Species today are descended from ancestors but have changed over time.
200
Why are lionfish especially successful invaders in the Caribbean?
Give three reasons
They have few natural predators, eat a wide variety of prey, and reproduce quickly.
200
What is a niche?
The role an organism plays in its ecosystem—what it eats, where it lives, how it behaves, etc
200
What is the difference between a prokaryotic and eukaryotic cell?
Eukaryotic cells have a nucleus; prokaryotic cells do not.
200
What does GRROE stand for?
Growing Research Restoration, Outreach, Education .... of USVI Mangroves
300
In a Punnett square, what do the letters on the outside represent?
The alleles from each parent.
300
Describe the difference between homologous and analogous structures.
!! DOUBLE !! (600!!)
Give an example of homologous and analogous structures.
Homologous structures come from a common ancestor but may serve different functions.
Analogous structures serve similar functions but evolved separately (much much more distant common ancestor).
300
Name two negative impacts lionfish have on Caribbean ecosystems.
They eat juvenile reef fish, reducing biodiversity, and outcompete native predators.
Prey fish have important niches (roles) in reef ecosystems... leading to further negative impacts
-Example: Less herbivorous fish = less algae grazing off corals. This leads to corals being suffocated by algae overgrowth.
300
What is the Competitive Exclusion Principle?
No two species can occupy the exact same niche in the same habitat for long—one will outcompete the other.
300
What is an ecosystem service, and name one provided by mangroves.
A benefit ecosystems provide to humans; mangroves protect coastlines and serve as fish nurseries.
300
Do you know this guy? Whats his name?
!! DOUBLE !! (600)
Whats he got to do with Evolution?
Tiktaalik is a famous transitional fossil that shows the link between fish and early land animals (amphibians).
400
What pattern of inheritance shows a blend of traits in the heterozygote?
Give an example.
Incomplete dominance.
Example: Red and white flowers produce pink offspring.
400
How does the fossil record support evolution?
It shows gradual changes in species over time and includes transitional forms linking ancient species to modern ones.
We can validate the time scales of fossils using modern technology like carbon dating.
400
Name three biological traits make lionfish good at invading new habitats?
Venomous spines, broad diet, high reproduction rate, and tolerance for a wide range of habitats (temperature and depth).
400
What could happen when two species try to occupy the same niche?
One species may go extinct, migrate, or adapt to a new niche.
400
Which type of graph is best for showing correlation between two numerical variables?
(ex: sunlight in hours and growth in cm)
Scatter plot.
400
Sing the chorus to 7th grade cell song !
[Chorus] (half points+200 if you do it now!)
Cells, cells, they’re made of organelles
Try to pull a fast one, the cytoplasm gels
The nucleus takes over, controlling everything
The party don’t stop ‘till the membrane blocks the scene
Inside the vacuole we can float around for hours
Running round with chloroplasts, lovin’ sunlight showers
Cells, cells, they’re made of organelles
500
Who is the "Father of modern Genetics"?
Whats their claim to fame?
Gregor Mendal
Pea Plant experiments !
500
Use the peppered moths as an example to explain how environmental change can drive natural selection.
When Industrial Revolution pollution darkened tree bark, dark-colored moths survived better than light-colored ones, leading to more dark moths in future generations.
500
Suggest two strategies for controlling the lionfish population and explain how they could help.
Organize (or PARTICIPATE in) lionfish hunting tournaments and encourage them as a food source. These reduce numbers and raise awareness.
500
Two animals can reproduce, but their offspring are sterile. What does this say about their classification?
They are two separate species
500
Describe the experimental design of your mangrove experiment, including variables and controls.
Investigation of more cost effective and sustainable ways to grow red mangrove propagules for restoration work in the USVI. As alternative to soil, recycled crushed glass is being investigated as a substrate to grow propagules in.
Compare differences in propagule growth between different substrate treatments.
Independent variable: substrate type (soil, glass, mix).
Dependent variables: epicotyl growth and survival.
Controlled variables: light, water, and species used.
500
Mangrove Cuckoo
600
Explain how meiosis increases genetic variation. Name two ways.
Through crossing over during Prophase I and independent assortment during Metaphase I.
600
What three patterns of biodiversity did Darwin Note
Globally - similar animals live in different parts of the world, but in similar environments.
Locally - in the same region, closely related animals looked different depending on where they lived.
Over Time- fossils of extinct animals that looked similar to living animals today.
600
Whats the difference between venom and poison ?
Venom - injected , puncture to skin
Poison - injested, absored through circulatory system
600
Whats the deal with ligars?
Ligers:
- HYBRIDS , not considered a species
- Are created only in captivity (not naturally in the wild)
- Often have health problems or are sterile
- Can’t reliably reproduce and create more ligers
600
What is a scientific theory?
a well tested explanation, supported by lots of evidence, that unifies a broad range of observations and hypothesis.
A theory explains WHY something happens
For example: Evolution
Evolutionary theory is the central organizing principle of biological science, and is able to wide range of predictions about organisms.