WorksheetsScience Leap Review
Total questions: 75
Worksheet time: 1hrs 11mins
Which statement correctly describes a difference between plant cells and animal cells?
Animal cells have cell membranes, but plant
cells do not.
Plant cells have cell membranes, but animal
cells do not.
Animal cells have chloroplasts, but plant cells
do not.
Plant cells have chloroplasts, but animal cells
do not.
A student wants to perform an experiment to test how much water bean plants need for good growth. Which factor should be changed?
The Temperature
The amount of light
The amount of water
The amount of soil
A Euglena contains a structure called a flagellum. What is the function of the flagellum?
Reproduction
Movement
Protection
Food Gathering
In guinea pigs, black hair color is dominant (B) and white
hair color is recessive (b). What hair color are the
guinea pigs’ offspring?
All black
All white
Mostly black with some white
Mostly white with some black
In a food chain, which are the most efficient users of solar energy?
Herbivores
Carnivores
Omnivores
Parasites
Green plants are important to animals because the
plants________
consume food and give off oxygen
consume food and give off carbon dioxide
produce food and give off oxygen
produce food and give off carbon dioxide
Snakes feed on mice. The mice eat grain crops.
When the crops are plentiful, what will happen?
The mouse population will decrease.
The snake population will increase.
The snake population will decrease.
The mouse population will not change.
After a recent experiment, a scientist noticed that
the computer simulation varied from the actual
experiment. What should the scientist do?
Repeat the experiment several times in order to
verify the results.
Adjust the computer’s program so it matches
the actual results.
Ignore the actual results as inaccurate because
computers are very precise.
Ignore the simulation as inaccurate because of
a possible computer virus.
Why does a gamete produced during meiosis have
half as many chromosomes as a daughter cell
produced during mitosis?
Meiosis does not involve a step in which the
original cell makes a copy of its chromosomes.
Meiosis involves a second cell division that
separates identical chromosomes.
Mitosis does not involve a step in which the
original cell makes a copy of its chromosomes.
Mitosis involves a second cell division that
separates identical chromosomes.
Which best describes the function of a ribosome?
storage waste products
manufacturing proteins
digesting food particles
providing support
A student draws and labels the parts of an animal cell, as shown. What organelle is labeled incorrectly?
Mitochondria
Golgi Apparatus
Vacuole
Ribosome
The chart shows some levels of organization in an organisms. Which term best completes the chart?
Cell-->Tissue-->Organ--> ? -->Organism
Organelle
Organ System
Muscle
Chemical
A student put a few drops of lemon juice into an uninflated balloon. The student tied a knot in the balloon, placed it in a shoebox and covered it with a lid. The following day, the student opened the box and was able to smell lemon in the box. Through what process were molecules able to pass through the balloon?
respiration
fermentation
diffusion
radiation
During photosynthesis, carbon dioxide (CO2) and water (H20) react in the presence of sunlight to produce
Oxygen and carbon
glucose and carbon monoxide
glucose and oxygen
hydrogen and oxygen
Which diagram best represents an exchange of gases between plants and animals?
The diagrams represent the way that three different organisms reproduce. Which of these classifies the reproductive method of all the organisms shown above?
segmentation
budding
asexual reproduction
sexual reproduction
The image shows a chromosome. What is located on the chromosome?
cells
genes
enzymes
organelles
In pea plants, tall plants (T) are dominant to short plants (t). The cross of two heterozygous tall plants is shown in the Punnett square below.
4 tall : 0 short
3 tall : 1 short
2 tall : 2 short
1 tall : 3 short
Which pair of characteristics is common to all
living things?
having lungs to breathe and using wings to
move
having a vascular system and producing cells
during growth
having one or more cells and having the ability
to reproduce
having a digestive system and responding to
certain environmental factors
Even on a windy day, most plants can remain
upright. Which structure plays the greatest role in
providing a plant with this type of support?
nucleus
mitochondria
cell wall
skeleton
Which statement correctly identifies a function of a chloroplast in eukaryotic cells?
It contains cellulose, which helps a plant
conduct respiration
It contains cellulose, which helps an animal
conduct respiration.
It contains a green pigment, which helps a
plant capture energy from sunlight.
It contains a green pigment, which helps an animal capture energy from sunlight.
What is the primary function of cell structure X?
maintaining the cell's shape
providing energy for the cell
storing the cell's food, water, and wastes
monitoring what materials enter and exit the cell
A scientist examines a structure within a cell that
contains a large amount of genetic material. Which
statement best identifies this structure’s function?
It controls cellular activities.
It stores food, water, and wastes.
It gives the cell shape and support.
It uses light energy to make sugars.
Which statement describes how a plant cell’s
functions would change in the absence of a
vacuole?
The cell would not be able to produce proteins.
The cell would lack energy to destroy foreign
objects.
Fluid and wastes would not be stored within
the cell.
Materials would not be transported between
the nucleus and cell membrane.
A scientist wanted to study a cell which lacked
the structure that contains the materials needed to
control cell activities. Which structure would need
to be missing from the cell for this study to take
place?
nucleus
vacuole
lysosome
mitochondria
A walking stick is an insect that looks like a twig
from a tree. Which characteristics are best used to
classify the walking stick as an animal, and not a
plant?
It is mobile, and it is a consumer.
It is multicellular and eukaryotic.
Its cells have nuclei and a cell membrane.
It reproduces and makes energy using sex cells.
Which statement correctly describes a difference between prairie dogs and strawberry plants?
Prairie dogs can reproduce sexually and asexually; strawberry plants can only reproduce sexually.
Prairie dogs can reproduce sexually and asexually; strawberry plants can only reproduce
asexually.
Prairie dogs can only reproduce asexually; strawberry plants can reproduce both sexually
and asexually.
Prairie dogs can only reproduce sexually; strawberry plants can reproduce both sexually
and asexually.
A gardener is investigating whether Brand X
fertilizer will increase the growth rate of the rose
plants growing in an outdoor garden. Which rose
plant would be the control for this investigation?
a rose plant in the garden given only water and
sunlight
a rose plant in the garden given Brand X
fertilizer, water, and sunlight
a rose plant in a container given Brand X
fertilizer and placed inside a greenhouse
a rose plant in a container given only water and
sunlight and placed inside a greenhouse
A genetic mutation in a lizard population makes it
easier for the lizards to find food. Which statement
best describes what must also happen for natural
selection to occur?
The lizards must migrate to another area.
The lizards must continue to have genetic
mutations.
The lizards must pass the mutated gene on to
their offspring.
The lizards must share their food with other
lizard populations.
Which of these best identifies biotic factors in a forest environment?
plants, animals, and their surroundings; including wildflowers, birds, rocks, and water
the features of the habitat and decaying material; including soil, air, dead trees, and bacteria
the things living plants and animals need; including air, water, soil, and nutrients
producers, consumers, and decomposers; including wildflowers, deer, songbirds, and mushrooms
Abiotic factors in an environment include all of the
plants, animals, fungi, and bacteria living in a
habitat
air, water, and food that living organisms use
to stay alive.
organisms, including those currently alive and
those that were once living.
rocks, water, sunlight, nutrients, climates, and
other nonliving characteristics.
Which statement does not describe a possible
function of chromosomes?
They regulate the proteins in a cell
They provide a cell with energy
They determine the gender of an individual
They influence the traits of an entire organism
How does the number of chromosomes in egg and
sperm cells at the end of meiosis compare with that
in body cells?
They have half the number of chromosomes.
They have twice the number of chromosomes.
They have the same number of chromosomes.
They have one-fourth the number of chromosomes.
A relative of the giraffe called an okapi has
44 chromosomes in its skin cells. How many
chromosomes does a female okapi have in her egg
cells?
11 chromosomes
22 chromosomes
44 chromosomes
88 chromosomes
Which statement describes the beginning and end
products of meiosis?
One diploid cell becomes two haploid cells.
One haploid cell becomes two diploid cells.
One diploid cell becomes four haploid cells.
One haploid cell becomes four diploid cells.
In which situation would osmosis most likely occur in cells?
across a permeable membrane that separates solutions of the same concentration
across a permeable membrane that separates solutions of different concentrations
across a nonpermeable membrane that separates solutions of the same concentration
across a nonpermeable membrane that separates solutions of different concentrations
Which statement best describes the process of respiration?
Oxygen and sugar are used in the process that provides energy to cells; water and carbon dioxide are its waste products.
Water and sugar are used to in the process that provides energy to cells; oxygen and carbon dioxide are its waste products.
Oxygen and carbon dioxide are used in the process that provides energy to cells; sugar and water are its waste products.
Carbon dioxide and sugar are used in the process that provides energy to cells; water and oxygen are its waste products.
Trish constructed a dichotomous key to help identify the reptiles and amphibians living in a certain area. Which phrase describes a lizard?
an animal with scaly skin and a shell but no external gills
an animal with scaly skin and legs but no shell
an animal with legs and coastal grooves but no tail
an animal with external gills and a tail but no coastal grooves
What do scientists mean when they refer to a population?
all the organisms in an ecosystem
all the species that share similar anatomical features
all the animals that acquire resources through similar methods
all the interbreeding members of a certain species in an ecosystem
Which relationship is mutualistic?
an insect that lives and feeds on the body of an alligator
an ant that lives on a plant and defends the plant from other insects
a bird that migrates to follow the movements of the butterflies that it eats
a deer that eats one kind of plant, which allows another kind of plant to grow in its place
The graph shows the population of rabbits in a field over a seven-year period. Based on the data, what is the approximate carrying capacity in the field for rabbits?
200
400
500
600
What is the main reason humans need nitrogen to survive?
Nitrogen is used in respiration to generate energy.
Nitrogen is used in making the proteins in the body.
Nitrogen is used to help the body eliminate wastes.
Nitrogen is used by nerve cells to conduct impulses.
Scientists have observed an increase in global temperatures over the past 100 years. Which phenomena do scientists believe contributes to the increase in temperatures?
an increase in undersea volcanic activity
a decrease in the distance between Earth and the Sun
an increase in certain gases released during the use of fossil fuels
a decrease in the amount of water on Earth due to overconsumption
Which genotype represents a female who is colorblind?
Sometimes when people eat, the food accidentally
enters a tube near the beginning of the respiratory
system instead of the digestive system. This causes
a person to cough. In which part of the respiratory
system can food sometimes get stuck and cause
difficulty in breathing?
lung
alveoli
trachea
diaphragm
A patient is having trouble reabsorbing excess
water from the digestive system. The first organ
the doctor will most likely examine is the
stomach
esophogus
large intestine
small intestine
