WorksheetsCAST Review: Life Science
Total questions: 58
Worksheet time: 41mins
Which of the following describes a predatory interaction?
an interaction where one organism hunts and eats another organism
an interaction between organisms of different species where both organisms benefit
an interaction where two organisms compete for resources
Which statement about forelimb buds best supports the claim that humans, bats, and birds are related through evolution?
Forelimb buds are found in the embryos of humans, bats, and birds.
Human and bat embryos have forelimb buds, but bird embryos do not.
Which two traits are inherited via genes?
a person’s natural hair color
a person’s hairstyle
the likelihood that a person will lose their hair as they age
Which statement best describes the relationship between genes, proteins, and traits?
Proteins encode genes, which help determine an organism’s traits.
Genes encode proteins, which help determine an organism’s traits.
Proteins affect an organism’s traits, but genes do not.
Similar features that have evolved along separate evolutionary paths are called .
(a)
According to scientists, cycads share more homologous features with banana plants than they do with mosses.
Which evolutionary tree correctly shows the relationship between cycads, bananas, and mosses?
Which term best describes the interaction between remoras and lemon sharks described in the passage?
(a)
Which of these best describes a provisioning ecosystem service?
a useful resource that comes from an ecosystem
an effect of an ecosystem on a person’s traditions
a process that helps keep an ecosystem healthy
Which arrow is pointing to a cell part that breaks down sugars to provide energy for the cell?
A
B
C
After a cat eats food, which of these three steps occurs second?
Large food molecules are broken down into smaller molecules in the cat’s digestive system.
Energy from food is used to do work in the cat’s cells.
The atoms in food molecules are rearranged by chemical reactions inside cells, releasing energy.
In a (a) interaction, the organism of one species benefits, and the organism of the other species also benefits.
Plant A has a higher reproductive success than Plant B.
Based on this information, which statement is most likely true?
Plant A has more surviving offspring than Plant B.
Plant B has more surviving offspring than Plant A.
Plant A and Plant B have the same number of surviving offspring.
On a short timescale, what is most likely to happen if the black bear population gets smaller?
The beaver population will get larger.
The silver maple population will get larger.
The swallowtail caterpillar population will get smaller.
Each chromosome in a cell contains (a) .
During and after photosynthesis, energy changes from one form to another in a series of steps.
Which step related to this energy transformation occurs second?
Sugar molecules are rearranged, releasing chemical energy.
Chlorophyll captures light energy.
Light energy is used to build sugars from carbon dioxide and water.
Biodiversity describes the (a) in an ecosystem.
Humans get many resources from rainforest ecosystems. Which of these rainforest resources provides humans with a source of medicine?
plants that make anti-cancer compounds
trees that can be used for building materials
orchids that can be used as houseplants
What is represented by the circled branch point in the evolutionary tree?
the common ancestor of fish and amphibians, but not reptiles
the common ancestor of amphibians and reptiles, but not fish
the common ancestor of fish, amphibians, and reptiles
In a population of pea plants, some plants have yellow seeds and others have green seeds. The gene for seed color has two possible alleles. One allele is for yellow seeds (Y), and the other allele is for green seeds (y).
Consider this information about a certain pea plant in the population:
The plant has yellow seeds.
The plant has one allele for yellow seeds, and one allele for green seeds.
What phenotype does this plant have for the seed color trait?
YY
Yy
yellow seeds
green seeds
Ecosystems are dynamic. This means that ecosystems’ characteristics (a) over time.
Which of these is an anatomical feature that could provide evidence of an evolutionary relationship?
a shared DNA sequence
a shared behavior
a shared bone structure
Plants provide which of the following to other organisms in an ecosystem?
sunlight and energy
food and oxygen
carbon dioxide and water
Which statement about the relationship between genes and proteins is true?
The order of nucleotides in a gene determines the order of amino acids in a protein.
The order of nucleotides in a protein determines the order of amino acids in a gene.
Which of these organisms is a producer in the tundra ecosystem?
brown lemming
snowy owl
bear sedge
arctic fox
Which of these occurs during reproduction?
Offspring pass traits to their parents.
One or two parents produce offspring.
Offspring inherit genes from each other.
Which of these is the smallest?
a gene
a cell
a chromosome
Which form of energy do plants capture in order to carry out photosynthesis?
light energy
chemical energy
Of the three embryos, which one is in the LATEST stage of development?
Which two statements are true for BOTH artificial and natural selection?
The selected traits are chosen by humans.
Traits in a group of organisms change based on which organisms are more likely to reproduce.
Genes underlying selected traits become more common in a group of organisms.
Which of these conclusions is best supported by the study described above?
Rat’s tail plants can only reproduce if they do not have a stalk.
Having a stalk leads to a decrease in a rat’s tail plant’s chance of being pollinated by birds.
Rat’s tail plant stalks help increase a plant’s reproductive success.
Both platypuses and ducks are animals with backbones. However, platypuses are mammals, and ducks are birds. This means that the most recent common ancestor of platypuses and ducks did not have a bill.
Are platypus and duck bills most likely homologous or analogous structures?
(a)
The digestive system includes the esophagus, stomach, large intestine, and small intestine. All of these parts are made up of cells.
Which of the following is true about the cells in the digestive system?
Cells in the stomach and large intestine have the same structure, but different functions.
Cells in the stomach and large intestine have different, specialized structures and functions.
Each cell in the stomach and large intestine is a unique type of cell.
The dog’s traits are most likely due to which of the following?
only genetic factors, such as which genes the dog inherited from its parents
only environmental factors, such as how much food the dog eats
a combination of genetic and environmental factors
Which of these is an example of a disadvantageous trait?
a trait that helps an organism defend itself from predators
a trait that increases an organism’s chance of mating
a trait that decreases an organism’s ability to get food
Which of these statements about food are true?
Food provides molecules that can be rearranged and incorporated into an organism’s tissues.
Food provides an energy source for an organism.
Food directly provides new mitochondria which an organism can use for cellular respiration.
A is a cell or cell part that detects signals from the environment.
(a)
Which of these tasks are carried out by the brain?
detecting stimuli in the environment
processing sensory information
triggering a response to sensory information
Which trait was most likely to help lizards survive and reproduce after the environmental change?
short hindlimbs
medium hindlimbs
long hindlimbs
Which statement about proteins is true?
Proteins function inside cells, and so do not affect an organism’s visible traits.
The order of amino acids in a protein affects its shape, but not its function.
Proteins carry out many different functions in the cell.
Which sentence best describes how pollinators, such as hummingbirds, help increase a plant’s reproductive success?
Pollinators transfer a plant’s pollen, which can lead to fertilization.
Pollinators use a plant’s nectar as an energy source.
Pollinators disperse a plant’s seeds.
Which two statements about the karyotype are true?
The two chromosomes circled in the karyotype contain the same set of genes.
Each number in the karyotype labels a homologous pair of chromosomes.
The karyotype shows that humans have a total of 23 chromosomes.
A diploid organism has (a) in each cell.
Of the three points, which one shows where competition in the wolf population was likely the lowest?
A
B
C
What would happen to a plant cell if its chloroplasts stopped working properly?
The cell would become an animal cell.
The cell wall would take over the chloroplasts’ function.
The cell would not be able to make sugars via photosynthesis.
Which of these mutations would best be described as beneficial?
a mutation that increases a mouse’s ability to blend in and hide from predators
a mutation that has no effect on a rabbit’s observable traits
a mutation that increases a dog’s chance of developing kidney stones
Which type of reproduction results in offspring that are genetically identical to a parent?
asexual reproduction
sexual reproduction
Individuals with advantageous traits will likely have (a) compared to individuals with disadvantageous traits.
Which ecosystem services are defined as the processes that keep ecosystems healthy?
provisioning ecosystem services
regulating ecosystem services
cultural ecosystem services
According to scientists, whales are more closely related to lemurs than to clownfish.
Which evolutionary tree correctly shows the relationship between whales, lemurs, and clownfish?
What is the most likely function of the specialized structures described above?
to increase the chance that a male bee will reproduce
to bring in bees that will help with seed dispersal
to attract bees that will pollinate the flower
Which of these describes an ankylosaurus fossil?
a drawing of an ankylosaurus in a book
a human-made model of an ankylosaurus in a museum
an ankylosaurus footprint preserved in rock
In a population of Hibiscus plants, some individuals have red flowers and others have white flowers. The gene for flower color has two possible alleles. One allele is for red flowers (F), and the other allele is for white flowers (f).
Consider a cross between two Hibiscus plants. One of the plants is homozygous for red flowers (FF). The other plant is heterozygous (Ff).
Which Punnett square correctly models the results of this cross?
Which arrow best represents the movement of carbon dioxide during photosynthesis?
A
B
C
Which of these best describes how energy moves in an ecosystem?
Energy moves through an ecosystem, eventually leaving as heat.
Energy cycles between living and nonliving parts of an ecosystem.
Fossils are
(a) .
Which of the following is made up of cells?
a glass fish tank on a shelf
a fish swimming in a tank
a plastic castle in a fish tank
Based on the diagram, which statement about atoms in the reactants and products is true?
The reactants contain the same number of oxygen atoms as the products. (answer)
The reactants contain fewer hydrogen atoms than the products.
The reactants contain more carbon atoms than the products.
Which of the following steps related to sensory processing occurs first?
The brain triggers a response and stores a memory.
Signals from the environment are detected by the body’s sensory receptors.
Sensory receptors pass information along nerve cells to the brain where the information is organized.
