WorksheetsEOC 7th grade
Total questions: 73
Worksheet time: 43mins
What is the relationship between genes and chromosomes?
Genes are parts of chromosomes
Genes are independent of chromosomes
Chromosomes are inside genes
There is no relationship
If smooth and wrinkled pea pods are crossed and the offspring results in 3 smooth and 1 wrinkled pea pod, what is the dominant trait?
Smooth
Wrinkled
Both are dominant
Neither is dominant
What is DNA?
A type of protein
Deoxyribonucleic acid
A cell component
A sugar molecule
Give an example of an inherited trait.
Eye color
Reading ability
Language spoken
Favorite food
What do the letters outside the Punnett square represent?
The offspring's genotype
The parent's phenotype
The parent's genotype
The offspring's phenotype
What do the letters inside the Punnett square represent?
The parent's genotype
The offspring's phenotype
The parent's phenotype
The offspring's genotype
If offspring is Dd, Dd, dd, and dd, what are the parent alleles?
DD and dd
Dd and Dd
DD and DD
dd and dd
What is the definition of genotype?
The physical appearance of an organism
The genetic makeup of an organism
A type of genetic mutation
A method of genetic analysis
During a biology class, William is asked to identify an example of a phenotype. Which of the following should he choose?
Blood type
DNA sequence
Eye color
Chromosome number
If the genotype of an offspring includes BB, Bb, and bb, what percentage represents the homozygous dominant (BB) and heterozygous (Bb) types?
25% BB, 50% Bb
50% BB, 25% Bb
75% BB, 25% Bb
50% BB, 50% Bb
When purple flowers are crossed with white flowers and all offspring are purple, what is the dominant trait?
White
Purple
Both
Neither
Define sexual reproduction and provide an example.
Reproduction involving one parent, e.g., bacteria dividing
Reproduction involving two parents, e.g., humans
Reproduction without the fusion of gametes, e.g., starfish
Cell division in somatic cells, e.g., skin cells
Define asexual reproduction and provide an example.
Reproduction involving two parents, e.g., birds
Reproduction involving fusion of gametes, e.g., flowering plants
Reproduction involving one parent, e.g., amoeba
Genetic exchange between two cells, e.g., bacteria
What is mitosis and can you name an organism that reproduces this way?
A type of sexual reproduction, e.g., humans
A type of asexual reproduction, e.g., yeast
Cell division that results in two identical daughter cells, e.g., skin cells
The process of reducing chromosome number by half, e.g., in meiosis
Define meiosis and give an example of an organism that uses this process.
Cell division in somatic cells, e.g., liver cells
Cell division that results in four non-identical daughter cells, e.g., humans during gamete formation
Asexual reproduction method, e.g., bacteria
Process of cloning, e.g., in plants
Which of the following best defines genetic engineering according to the learning material?
Altering the natural genes of plants to produce more fruit
The direct manipulation of an organism's genes using biotechnology
The process of making copies of a gene
The study of genes and their functions
What is an example of artificial selection?
Natural selection of the fittest animals
Breeding dogs to enhance specific traits
Random mutation in wild animals
Cloning animals in a laboratory
What is a genetically modified seed?
A seed modified by natural processes
A seed exposed to certain chemicals to enhance growth
A seed engineered to resist pests or tolerate herbicides
A seed taken from wild plants
How do consumers in a food web primarily obtain their energy?
By producing their own food through photosynthesis
By consuming other organisms
By decomposing organic material
By absorbing sunlight directly
What happens to a food web when a primary food source is no longer available?
The food web remains stable without any changes
Consumers adapt by photosynthesizing
There is a potential collapse or major shift in the food web
More food sources spontaneously generate
What is likely to occur in a food web if the population of a consumer increases significantly?
Decreased competition among consumers
Increased food supply for lower trophic levels
Potential overconsumption of resources leading to imbalance
Producers will increase their reproduction rates automatically
Which of the following best describes mutualism?
A relationship where both species benefit
A relationship where one species benefits and the other is harmed
A relationship where one species benefits and the other is unaffected
A relationship where both species are harmed
What is an example of a limiting factor in an ecosystem?
Predation
Migration
Photosynthesis
Pollination
Which term describes a relationship where one organism lives off another, harming it?
Commensalism
Mutualism
Parasitism
Symbiosis
What is an invasive species?
A species that is native and enhances biodiversity
A species that migrates seasonally
A species that is introduced to an area and causes harm
A species that is endangered
Which of the following is not a factor that contributes to the decline of a species?
Increased food supply
Habitat destruction
Overhunting
Disease
Define biotic factors in an ecosystem.
Non-living chemical and physical parts of the environment
Living components of the environment
Geological features like mountains and rivers
Climate patterns over long periods
What would happen to a population of squirrels if their food supply increased?
The population would decrease
The population would stay the same
The population would increase
The population would migrate
Identify an activity that negatively impacts the environment due to human actions.
Planting trees
Urbanization
Recycling
Using solar energy
What is one positive impact humans can have on the environment?
Littering in parks
Deforestation
Creating wildlife reserves
Increasing vehicle emissions
What causes desertification?
Excessive rainfall
Overgrazing and poor agricultural practices
Decreased carbon emissions
Increased forestation
What evidence does the fossil record provide?
Proof of technological advancements
Evidence for evolution
Data on mineral deposits
Information on ancient human civilizations
Why might fossils of different species have similar skeletal structures?
They were from the same time period
They had similar diets
They had different functions but similar evolutionary origins
They lived in the same geographic location
Define natural selection and provide an example.
The process where species less adapted to their environment survive
The survival and reproduction of organisms that are genetically best adapted to the environment
The artificial breeding of animals and plants
The migration of species from one environment to another
In the picture below, which animal is most closely related to whales?
Camels and llamas
Pigs and peccaries
Hippopotamuses
Hoofed grazing mammals
What difference did Darwin observe about the Galapagos finches?
They all sang the same song
They had different beak shapes depending on their diet
They could fly underwater
They were all the same color
Explain how variation in a species helps that species survive.
What are adaptations and how do they help an organism survive?
What factors might lead to the extinction of a species?
Increased biodiversity
Stable and unchanging habitats
Loss of habitat
All species living in harmony
What does relative dating help determine in geology?
The exact age of an object in years
The sequence of events in which geological formations occurred
The chemical composition of rocks
The temperature at which rocks form
What is the Law of Superposition?
A method to determine the absolute age of fossils
A principle stating that younger layers of rock are deposited on top of older layers
A law describing the conservation of mass in chemical reactions
A theory explaining the movement of tectonic plates
What type of rock do fossils most commonly form in?
Igneous
Metamorphic
Sedimentary
Basaltic
How can a fossil that formed at the bottom of the ocean be found on a mountain?
Through volcanic eruptions
Due to erosion and sediment transport
By tectonic plate movements and uplift
Fossils cannot be found on mountains
How can the same fossils be found on different continents?
Due to the migration of species across land bridges
Because of the dispersal of spores or seeds by wind
Resulting from the drifting of continents (continental drift)
Fossils cannot be found on different continents
Which two layers make up the lithosphere?
Crust and Mantle
Mantle and Core
Crust and Core
Mantle and Asthenosphere
What is the primary process involved in the rock cycle that connects it to plate tectonics?
Photosynthesis
Erosion
Subduction
Condensation
Give an example of a real-world event that demonstrates erosion.
Volcanic eruption
River cutting through a valley
Earthquake
Solar eclipse
Which of the following is an example of weathering?
Formation of a mountain
River dam construction
Cracking of rocks due to plant roots
Tides in the ocean
What are tectonic plates?
Sections of the Earth's crust that move due to convection currents
Layers of the Earth's atmosphere
The outer shell of the Earth's core
Types of rocks formed from magma
What occurs at a transform plate boundary?
Plates slide past each other
Plates collide and form mountains
One plate slides under another
Magma rises to the surface
What is shear stress and at which boundary type does it occur at?
Stress that compresses rock at convergent boundaries
Stress that pulls rock apart at divergent boundaries
Stress that twists or tears rock at transform boundaries
Stress from heat at subduction zones
What kind of changes in the Earth's surface are caused by the movement of crustal (tectonic) plates?
Formation of mountains and ocean basins
Changes in the Earth's magnetic field
Alterations in the Earth's orbit
Fluctuations in sea level
Define subduction zone.
Area where two plates collide and one goes underneath the other
Zone where plates move away from each other
The point where plates slide past each other
Region where new crust is formed
Where do subduction zones often occur?
Along oceanic ridges
In the interior of tectonic plates
Near coastal regions
At the edges of continents and oceanic plates
What happens at a convergent boundary?
Plates move apart
Plates slide past each other
Plates collide and one slides beneath the other
Plates remain stationary
What is the result of movement at a convergent boundary?
Formation of a rift valley
Creation of a mountain range
Development of a new ocean
Expansion of a desert
How are volcanic mountains formed?
Accumulation of sediment in a basin
Erosion of an existing mountain
Movement of tectonic plates and magma eruption
Deposition of meteorite debris
What happens during the process of subduction?
The ocean floor spreads
A continental plate rises
An oceanic plate sinks beneath a continental plate
Two continental plates merge
Explain convection in the mantle.
Heat transfer through direct contact
Heat transfer through fluid motion
Heat transfer through radiation
Heat transfer through vacuum
What is one human activity that negatively impacts the environment due to deforestation, urbanization, or changing water flows?
Planting trees
Building dams
Recycling
Solar energy utilization
Which of the following is a positive human impact on the environment?
Industrial pollution
Conservation efforts
Overfishing
Use of pesticides
What is a primary cause of desertification?
Excessive rainfall
Afforestation
Overgrazing
Flood control
What is an allele?
A type of gene
A variant form of a gene
A type of chromosome
A mutation in a gene
What is an allele?
A type of gene
A variant form of a gene
A type of chromosome
A mutation in a gene
Genes always appear in pairs. Each parent donates ________ allele for every trait.
1
2
23
46
The passing of traits from parent to offspring is called _____.
heredity
genetics
DNA Replication
photosynthesis
What is a gene?
A bundle (like a hot dog bun) that the DNA is packed into
something inside the nucleus
a section/piece of DNA
all of your DNA
In each of your human body cells, there are (a) individual chromosomes, existing in (b) pairs.
This is a live oak tree, which can grow 40 to 80 feet tall.
This is a coconut palm tree, which can grow 60 to 80 feet tall.
Find one trait these two trees pass on to their offspring.
tree height
tree fungus
tree decay
