NEW
Font size
WorksheetsRemote Learning Week #10
Total questions: 25
Worksheet time: 2hrs 5mins
Which statement concerning sexual reproduction is correct?
It is not necessary in order for the individual to survive.
The offspring are identical to the parent.
It is necessary in order for the individual to survive.
The offspring are identical to each other.
When a paramecium, a single-celled organism, is living under stressful conditions, it sometimes switches from asexual to sexual reproduction. The main advantage when this switch occurs is that the paramecium is most likely to
produce fewer offspring
increase variation among its offspring
avoid having to find a mate
produce clones of itself
The diagram below represents some processes in the early development of a multicellular organism. Which statement describing this diagram is correct?
The cell represented by structure 3 has the same genetic content as structure 2.
Process A represents the process of meiosis.
Each cell in structure 4 has the same genetic content as that in structure 3.
Processes A and B both occur in the placenta.
Which statement describes a function of the hormone estrogen?
It regulates the secretion of digestive enzymes.
It promotes sperm production in males.
It influences the development of adult sex characteristics.
It maintains blood sugar levels.
The primary function of the human male reproductive system is to
provide a site for fertilization
produce and transport gametes
protect and nourish the embryo
prevent urine from leaving the body
In an embryo, the formation of many types of tissues and organs occurs as a result of the process of
fertilization
genetic sorting
differentiation
gene recombination
Which activity would be an appropriate first step when designing an experiment?
reporting a conclusion based on multiple experimental trials
researching the problem, using information from a variety of sources
creating a data table to organize experimental observations
repeating the experiment with a different hypothesis
Every time a child visited a cousin who has two cats, the child’s eyes turned red, itched, and began to water. Then, the child began to have trouble breathing. It is most likely that the child reacted this way because
normally harmless cat antigens stimulated the immune system
it is difficult for the respiratory system to filter cat antigens out of the inhaled air
cat antigens are a health hazard, since they always cause disease
cat antigens stop the immune system from making antibodies, so bacteria cause these responses
Shrimp that live in the cold waters off Alaska will die if introduced into warm water. One likely reason these shrimp do not survive is that enzymes in the shrimp
start to replicate
change shape
are composed of fat molecules that melt
break down into small starch molecules
A DNA segment removed from neurospora (a pink mold) contained the base sequence G-T-C-C-A-T-G-C-A. A similar segment of DNA removed from neurospora that had been exposed to radiation for several hours had the base sequence G-T-C-C-A-T. This change in the base sequence is an example of
a deletion
an insertion
a substitution
a replication
Farmers in India have increased the harvest yield of food crops like eggplant by growing them from seeds that have been modified to produce a bacterial toxin that is harmful to pest insects. This is an example of
selective breeding of the insects
spraying an insecticide on plants
selective breeding of the eggplant
an application of biotechnology
The graph below shows changes in human population numbers over time. A consequence of these changes is
an increase in the numbers and kinds of organisms worldwide
a decrease in the availability of natural resources
a decrease in deforestation due to technological improvements
an increase in biosphere stability
In the fall, some farmers plow the remains of corn plants into the ground. This activity contributes most directly to the
increase in the biodiversity of their fields
depletion of nonrenewable resources
destruction of natural habitats
recycling of organic matter
A person usually experiences small variations in body temperature over a 24-hour period. These variations in temperature are an example of
an immune response
genetic differences between individuals
an adaptation to global warming
dynamic equilibrium
Fossil fuels have been used for years as a source of energy. Even though there are many negative issues associated with the use of fossil fuels, they continue to be used to a great extent. This is most likely because
they have been commercially available as an energy source
there are alternatives to these types of fuels
they have had a positive effect on global temperatures
fossil fuels can be burned to produce large quantities of carbon dioxide
Sometimes, a person is born with one or more extra chromosomes in each cell. This usually results in abnormalities because the affected person has
a reduced number of genes in cell nuclei
fewer cell mutations than a person with a normal chromosome number
more genes in each cell than a person with a normal chromosome number
less DNA in cell nuclei, but more proteins in cell mitochondria
Variation in snail color is an example of
environmental stability
a natural limitation
equilibrium
diversity
The diagram below represents relationships in a community. After a pathogen reduced the population of grasshoppers, the number of mice increased, while the numbers of toads and rabbits decreased. These changes in the community demonstrate that
ecosystems are shaped by nonliving factors
autotrophs convert solar energy into food
grasshoppers are producers that are essential for ecosystem stability
populations are linked with many others in the ecosystem
This process best represents
the bonding of amino acids to form a starch molecule
the digestion of amino acids to form a starch molecule
the bonding of simple sugars to form a starch molecule
the digestion of simple sugars to form a starch molecule
The letter X in the process represents
an antibody
a hormone
a receptor
an enzyme
Blockages caused by a condition known as Pelvic Inflammatory Disease (PID) are represented in the diagram of the female reproductive system below. If blockages of this type occur, the most likely result would be that
the egg would remain in the uterus and not travel upward
the female gamete would not be able to unite with the male gamete
hormones could not be produced by the ovaries
the process of asexual reproduction would be prevented or interrupted
If no additional materials were added to the culture dish, after day 14, the paramecium population would most probably
remain the same, since it has reached carrying capacity and has an unlimited food supply
begin to increase as they continue to reproduce
begin to increase, since they have not yet reached carrying capacity
begin to decrease as finite resources are used up
In another experiment, a second species of paramecium was introduced into a culture dish with Paramecium aurelia. Which statement describes a possible result as the populations interact over the next 14 days?
The population numbers of Paramecium aurelia would be lower than 250, since the new species is competing with it for resources.
The population of Paramecium aureliawould increase above 250, since they would mate with the new species.
The population of Paramecium aurelia would increase above 250, since the two species occupy the same niche.
The population of Paramecium aurelia would remain at 250, since the species compete with each other for the same resources.
The chart below lists substances involved in the process of photosynthesis. Which statement best describes how these substances interact in photosynthesis?
A and B combine to produce C and D.
B and C combine to produce A and D.
C and D combine to produce A and B.
A and C combine to produce B and D.
The diagram represents the current percentage of each population by age and gender (male/female) for two countries. At the present time, both populations have the same number of individuals. In which of these countries will the population growth over the next 20 years place the greatest strain on the environment?
Country A, since the larger percentage of young could result in rapid population growth
Country B, since the smaller percentage of young could result in rapid population growth
Country A, since the smaller percentage of people over 60 uses the most resources
Country B, since the larger percentage of people over 60 uses the fewest resources
