In this type of symbiotic relationship, both organisms are helped.
What is mutualism?
100
What agent of erosion is most likely responsible for the formation of sand dunes in a desert?
What is wind?
100
What is a trace fossil?
A fossil is formed in soft sediment by the movement of an animal (ex. tracks, footprints, burrow, etc.)
100
Draw a Punnett square and correctly place these 2 parents: AA and Aa.
One parent should be above the square, 1 letter per box. The other parents should be to the left of the square, one letter per box.
(Teacher will check your answer.)
100
Where is the DNA stored in a eukaryotic cell?
nucleus
200
Describe the meaning of the arrows shown in a food chain or web.
The arrows show the direction of the energy flow in the ecosystem.
200
Rocks found on riverbanks are often very smooth because they have rubbed against other rocks and sand in the river. What kind of weathering is this an example of?
What is physical weathering?
200
What is the law of superposition?
A sedimentary rock layer is in its original position and is older than the layers above it and younger than the layers below it.
200
Alisha and Rob would like to have children. A genetic counselor tells them that they are both carriers of a certain genetic disease. What does this mean?
They both have an allele for the disease and could pass this allele on, even though neither of them has the disease.
200
Sandra discovers a new plant in a forest. She observes it for some time, and when it reproduces, she tests the offspring and finds that they are genetically identical to the parent.
What type of reproduction must the plant use, and how many parents must be needed?
asexual; only 1 parent
300
What is the primary role of decomposers in an ecosystem?
to recycle energy and materials that cannot be used by producers and consumers
300
The term for the dropping of sediment along or at the end of a river.
What is deposition?
300
What is the difference btween relative and absolute dating?
Relative compares the age of rock layers and the fossils found in them, to one another.
Absolute determines the exact age of rock samples.
300
Having attached or unattached earlobes is an inherited trait. The two alleles responsible for an attached earlobe are ee.
What are the genotype and phenotype of such an individual?
genotype = ee
phenotype = attached earlobe
300
List the following levels of organization, in order, from smallest to largest:
organ system, tissue, cell, organism, organ
cell < tissue < organ < organ system < organism
400
Remoras are small fish that attach to sharks but do not harm them. When sharks tear prey apart, remoras eat the leftovers. What relationship do remoras have with sharks?
What is commensalism?
400
Which is a cause of physical weathering, but NOT of chemical weathering?
water, wind, air, or acids
What is wind?
400
Trace fossils are much more common than body fossils. What is the reason?
A single animal can leave thousands of traces in its lifetime but will leave only one body when it dies.
Also, conditions have to be very specific to preserve a body fossil before it decays.
400
What does one box inside a Punnett Square represent?
one possible combination of alleles in all offspring
400
What is a difference between eukaryotic cells and prokaryotic cells?
Only eukaryotic cells have membrane-bound organelles, so eukaryotic cells have a nucleus and prokaryotic cells do not.
500
Ecological environments can be divided into different levels of organization. Identify the correct order from largest to smallest
population, organism, ecosystem, community
ecosystem, community, population, organism
500
Differentiate between weathering and erosion. Also give an example of each.
Weathering is the breakdown of rock of matter, while erosion is the movement of the sediment after it has been weathered.
Examples may vary. The teacher must approve the examples given.
500
Imagine that you found a fish fossil on a mountaintop. What can you conclude from your discovery?
The rocks on this mountaintop probably formed at the bottom of an ocean.
500
Draw and solve a Punnett Square, using the letter B, when one parent is homozygous dominant and the other parent is heterozygous.
(Teacher will check your answer.)
500
Name 2 of the 3 organelles that differentiate a plant cell from an animal cell.
cell wall, chloroplast, and large central vacuole
(only 2 of these need to be given)