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WorksheetsBiology STAAR Review - No Category 2
Total questions: 27
Worksheet time: 16mins
Why is genetic diversity important in a population?
Genetic diversity makes the population more attractive
Genetic diversity means that more prey live and predators die
Genetic diversity increases the survivability for individuals in a species
Genetic diversity does more harm than good
A herbicide killed 99% of a weed population. Which of the following is the best biological explanation for some of the weeds being able to survive?
Some individuals were able to evolve before the spraying.
The spray caused some individuals to mutate, and they were able to survive and reproduce.
Each individual occupied a different ecological niche and so some were unaffected
Genetic variation in the population allowed some weeds to survive
What percent of energy is gained between each tropic level on the energy pyramid?
Type answer as _ _%
(a)
What would be the complementary DNA strand to this DNA sequence TGA-AGC.
Answer: _ _ _-_ _ _
(a)
Developers bulldozed a forest to build a new subdivision. How does this effect the atmosphere?
Less carbon dioxide would be removed from the atmosphere
An increase in animal respiration would increase the release of carbon dioxide in the area
More sugars and starches would be available for animals in the area
There would be no change in the atmosphere
Which body systems are involved in providing the body nutrients to run?
Nervous System
Muscular System
Digestive
Circulatory
Which cells are Eukaryotic?
Cell W
Cell X
Cell Y
Cell Z
Identify lady bug A
Ladea kaley
Ladea rachel
Ladea allison
Ladea jessica
Transcribe this gene TGC-ACA
Answer _ _ _-_ _ _
(a)
Where do spindle fibers form in the cell cycle to separate DNA?
Mitosis
Interphase
S phase
G2 phase
What stage of mitosis is this cell in?
Prophase
Metaphase
Anaphase
Telophase
Which cell types are capable of conducting photosynthesis?
Animal Cells
Fungal Cells
Plant Cells
All Eukaryotic Cells
What does the diagram suggest about evolutionary relationships?
The brown bear is more closely related to the mole than the polar bear
The polar bear is more distantly related to the brown bear than the marsupial mole
The mole and the gorilla share a common ancestor
There is no relationship between the species
Which organisms is the LEAST related to the other three organisms?
Organism 1
Organism 2
Organism 3
Organism 4
In the 1880's, Louis Pasteur developed a method of weakening viruses. The weakened virus could be injected into health individuals.
How is this method effective in fighting viral diseases?
The immune system develops antibodies in response to the weakened virus
The weakened virus attach to unaffected viruses in the host to disrupt the reproductive cycle
The rate of genetic mutation in the host is decreased due to the introduction of the weakened virus
Weakened viruses are unable to enter the host organism
Which of these best demonstrates mutualism between certain types of bacteria and humans?
Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.
Bacteria become resistant to antibacterial medication that humans use for treatment
Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.
Although these organisms belong to the same phylum, they are classified as different —
families
species
kingdoms
orders
A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.
What effect does continual mowing have on the ecology of the field?
Mowing increases the likelihood of nonnative species displacing native species.
Mowing increases the number of species found in the field.
Mowing causes different types of communities to form across the field.
Mowing maintains a low species diversity by inhibiting further succession.
In which phase of the cell cycle is DNA replicated?
G1
S
G0
Mitosis
Which of these organisms would be placed at the top of an energy pyramid?
Racoon
Eastern mud turtle
American Alligator
Southern leopard frog
Which result is most likely to occur to the beetle population due to predation over time?
The number of light-colored beetles in the population will increase.
There will be more dark-colored beetles than light-colored beetles.
The number of light-colored beetles will decrease.
The dark-colored beetles will move to a different type of tree.
Fruits grown in hot climates are usually less sweet than those grown in cooler temperatures. The high temperatures increase the rate of respiration in the plants, thus reducing the sugar content in some fruits.
Why does increased respiration in the leaves and stems reduce the sugar content in the fruits of a plant?
Chloroplasts move from the fruits to the leaves and stems to provide energy for respiration.
The flow of nutrients shifts from the phloem to the xylem, moving nutrients away from the fruits.
Sugars are moved from the fruits to the roots for storage
Sugars produced in the leaves are used as an energy source instead of being stored in fruits.
What does arrow 1 and arrow 2 represent?
Arrow 1 represents prophase, and Arrow 2 represents interphase.
Arrow 1 represents mitosis, and Arrow 2 represents meiosis.
Arrow 1 represents interphase, and Arrow 2 represents mitosis.
Arrow 1 represents meiosis, and Arrow 2 represents prophase.
The image in the diagram represents a cell theory.
What cell theory is being represented?
The theory that all living organisms are made of cells
The theory that all living organisms share the same basic genetic components
The theory that organisms function best when their internal conditions are maintained within narrow limits
The theory that complex cells evolved after primitive cells engulfed bacterial cells that continued functioning
Which statement best explains why the grass tips of the experimental group bent toward the light?
Water evaporated faster on the side of the plant having full light.
Light sensors in the grass tips stimulated a hormone in the shoot system
The xylem in the root system absorbed more nutrients from the shaded side.
The side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere.
What type of succession is occurring in the image?
Primary
Secondary
Which ecological succession is occurring in the image?
Primary
Secondary
