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WorksheetsSemester 1 7th Grade Science Final Exam REVIEW
Total questions: 40
Worksheet time: 31mins
Which of the four statements correctly describes metaphase I?
It is the phase of mitosis in which pairs of chromosomes line up in the center of the cell.
It is the phase of meiosis in which a nuclear envelope forms around each set of chromosomes.
It is the phase of meiosis in which four haploid cells are formed.
It is the phase of meiosis in which pairs of chromosomes line up in the center of the cell.
Which headings should be inserted for i and ii in the table?
i = Mitosis and ii = Meiosis
i = Meiosis and ii = Mitosis
i = Meiosis I and ii = Meiosis II
i = Meiosis I and ii = Mitosis
What process or processes could have formed this cell?
meiosis I or meiosis II
fertilization or mitotic cell division
meiosis or mitotic cell division
sex cell formation
The urn plant is a common house plant with spiky pink flowers. It has a diploid chromosome number of 50. As in other flowering plants, the urn plant's flowers have special cells that produce sex cells by meiosis. Suppose a team of scientists adds a chemical to the flower cells that stops meiosis at telophase II and prevents cytokinesis. The treated flowers still produce sex cells, but these sex cells have twice the usual number of chromosomes. For each cell that undergoes meiosis, predict how many sex cells would form.
2
4
8
50
Which of the following is NOT an example of cloning?
Cells of a plant root are grown in a culture dish to produce a genetically identical plant.
Plants with the largest flowers are artificially selected to produce a new type of plant.
DNA from an endangered species is used to produce more individuals.
DNA from a sheep's egg cell is used to make a genetic copy of the donor sheep.
The black-footed ferret is the first endangered animal from North America to be cloned. An issue is that the black-footed ferret population has low genetic variation. Why is it important that scientists make different clones from different ferret parents?
Each clone can reproduce asexually.
Each clone can reproduce sexually.
Each clone is a genetic copy of its parent.
Each clone is made in tissue culture.
Spirogyra is a type of green algae that breaks into parts once it is mature. Each part becomes a new organism. In the lab, tests can be run to determine whether Spirogyra reproduces sexually or asexually. Which would be the best question to ask to help determine the form of reproduction Spirogyra uses?
Is Spirogyra unicellular or multicellular?
How long are the separate parts of a strand of Spirogyra?
How does the genetic material of the initial Spirogyra compare to that of the parts?
How many parts are produced?
Refer to the figure of the sea stars as you read the following question. In the past, people would sometimes cut sea stars into pieces to reduce their populations. However, it turned out that cutting up some sea stars did not kill them. Sometimes, the pieces instead grew into new sea stars. Which of the statements does NOT describe the new sea star offspring?
A. All of the arms of the new sea stars have identical DNA.
B. The parts of the new sea stars that came from the original sea star have different genetic material than the parts that regenerated.
C. All of the new sea stars are genetically identical.
D. A mutation in the original sea star will exist in the new sea stars.
9. The urn plant is a common house plant with spiky pink flowers. It has a diploid chromosome number of 50. As in other flowering plants, the urn plant's flowers have special cells that produce sex cells by meiosis. Suppose a team of scientists adds a chemical to the flower cells that stops meiosis at telophase II and prevents cytokinesis. The treated flowers still produce sex cells, but these sex cells have twice the usual number of chromosomes. Predict how many chromosomes the resulting sex cells would contain.
25
50
100
75
Which of the following steps in cloning a carrot plant is left out?
A. Root cells cluster on nutrient agar.
B. Root cells divide and grow.
C. Embryos form.
D. Young plants develop.
The Venn diagram compares the features of asexual and sexual reproduction. Which feature could be placed in the Both section of the Venn diagram?
little genetic variation among offspring
much genetic variation among offspring
requires fertilization
occurs in both plants and animals
The sexual reproduction between two purple pea plants produces purple and white offspring. Which of the four statements best describes the offspring?
The offspring contain genetic material from both parents.
The offspring contain genetic material from only one parent.
The genetic material of the offspring is identical to the parents.
The offspring have half as much genetic material as the parents.
“The cell is the basic unit of life” is a principle of which idea?
the theory of evolution
the theory of spontaneous generation
the cell theory
the theory of replication
Which statement does NOT describe the function of plant cell parts?
The cell membrane surrounds the plant cell's cytoplasm.
The plant cell vacuole stores substances like water and starch.
The plant cell cytoplasm determines what substances enter or leave the cell.
The cell wall helps maintain the cell's shape and protects the cell.
Which organelle is shown in the image?
Nucleus
mitochondrion
ribosome
chloroplast
Plant cells and some protists contain organelles such as the one shown in the illustration above. What cellular process takes place in these organelles?
photosynthesis
cellular respiration
protein production
reproduction
A student places some plant cells on a microscope slide. The student adds salt solution to the slide. Water leaves the cell, and changes the appearance of the cells on the slide. Which plant cell part functioned in allowing water to leave the cell?
mitochondria
chloroplast
ribosome
cell membrane
Through the openings of what structure do materials enter and leave the cell?
organelles
DNA
membrane
chromatin
What type of cellular transport is responsible for what the scientist observes in the plant cells?
endocytosis
exocytosis
facilitated diffusion
osmosis
A student wants to measure the activity of mitochondria in plant cells. Which question should the student investigate?
What is the rate of cellular respiration?
How fast is protein production occurring?
Which substances can enter and exit the cell?
How much light is needed for photosynthesis?
Which of the following is NOT involved in photosynthesis or respiration?
water
cytokinins
carbon dioxide
chlorophyll
Cells use different pathways to process glucose depending on the environmental conditions. What environmental conditions must exist for a cell to use the pathway shown below?
no sunlight
low oxygen
little water
extra glucose
Cells spend the majority of their lives in interphase. What is the first thing that happens in interphase?
It gets larger.
It gets smaller.
It divides again.
It rests.
Identify the two stages of the mitotic phase.
mitosis and interphase
cytokinesis and interphase
mitosis and cytokinesis
interphase and metaphase
If a cell has 22 duplicated chromosomes, how many chromatids does it have?
22
44
11
88
During the late 1700s, Carolus Linnaeus developed a method to organize all of Earth's lifeforms. These grouping are based on similar characteristics among the lifeforms. The largest group or division is the Kingdom. How many kingdoms are recognized on Earth today?
2
3
5
6
A student is asked to classify an unknown organism into either the protist kingdom or the bacteria kingdom. Which of the following questions should the student ask to help them decide?
Is it alive?
Is it unicellular?
Can it cause a disease in humans?
Does it have a nucleus?
A student views a cell under the microscope. They observe that it has a cell wall, a nucleus, and green chlorophyll inside organelles called chloroplasts. To which kingdom does this cell belong?
animals
bacteria
fungi
plants
Which statement about organisms in Kingdom Archaea is TRUE?
They are responsible for many human diseases like strep throat.
They lack a nucleus, and have chitin in their cell walls.
They can use elements like sulfur to produce energy.
They are classified as animal like, plantlike, or fungus like.
Which statement best describes the relationship between the Canadian Lynx (Lynx canadensis) and the Bobcat (Lynx rufus)?
Lynx canadensis and Lynx rufus share many similarities because they are part of the same kingdom, phylum, class, order, family and genus.
Lynx canadensis and Lynx rufus have many similarities because they are part of the same domain.
Lynx canadensis and Lynx rufus share many similarities because they are part of the same kingdom, phylum, class, order, family, genus and species.
Lynx canadensis and Lynx rufus share many similarities because they are part of the same kingdom.
Which term should be placed in the shape marked with the letter Q?
vascular
cell
organ
heart
A student attends a science presentation. The student comes late to the presentation, so they miss some information. They know that the presentation is about a plant organ system, but they do not know anything else. Which question should the student ask to help them identify the topic of the presentation?
Does the organ system include roots and shoots?
Does the organ system have cells and tissues?
Does the organ system have more than one organ?
Do the organs of the system work together to help the body complete tasks?
Which statement correctly summarizes the image?
The levels of organization shown in the image are the same as those that exist in plants.
The levels of organization shown in the image are in order from most complex at the top to least complex at the bottom.
There is one level of organization missing from this image, the least complex.
There is one level of organization that has been incorrectly added to the image at level B (organism).
Your friend makes a statement that since wolves and dogs are part of the same taxonomic order, they are more similar than cats and dogs. Another friend disagrees. She thinks that dogs and cats share more similarities since they have fur, teeth and live in people’s homes. She thinks this means they would be similar in taxonomy. What would be the best course of action you could take to help resolve the disagreement?
I could make a table of the characteristics of dogs, cats and wolves.
I could research the taxonomy of dogs, cats and wolves up to the level of order and correlate it with the characteristics of cats, dogs and wolves.
I could research the taxonomy of dogs, cats and wolves up to the level of species and compare it with the characteristics of cats, dogs and wolves.
I could take pictures of cats, dogs and wolves and point out their similarities and differences.
Which is supported by evidence in the diagram?
Lamprey and lizards are classified in the same order.
Lampreys are not related to any of the organisms shown.
Chimpanzees and bears are in the same genus.
Chimpanzees and sunfish share a common ancestor.
The diagram shows characteristics that can be used to classify organisms into kingdoms. Which two kingdoms could be used in place of the letter P?
Archaea and Bacteria
Archaea and Protists
Fungi and Bacteria
Fungi and Protists
The structure shown in the diagram falls between which two levels of organization?
A. organ and organism
B. molecule and cell
C. cell and organ
D. organ and organ system
Which cannot be modified or rejected based on new data?
hypothesis
inference
scientific law
scientific theory
Which of the following questions can be studied through scientific inquiry?
Is it fair to have more than one best friend?
What type of crust makes the best pizza?
Do the colors purple and orange look good together?
What factors affect the temperature at which water changes from a liquid to a solid?
Scientists organized weather data collected at a weather station. Which statement about the data is TRUE?
The average monthly temperature is highest in July.
The average monthly temperature is lowest in November.
The average monthly temperature never goes below 0°C.
The average monthly temperature in May is 20°C.
