Worksheetslife science - mixture of all
Total questions: 20
Worksheet time: 10mins
Birds are often seen with cattle in a pasture. The feeding cattle stir up insects and the birds eat the insects. How would this relationship be described?
The birds have a negative effect on the cattle, and the cattle have a positive effect on the birds.
The birds have a positive effect on the cattle, and the cattle have a positive effect on the birds.
The cattle have a positive effect on the birds, and the cattle are unaffected.
Which relationship exists by mutualism?
sticks and dogs
ants and acacia tree
Peregrine falcon and red-breasted geese
Some organisms obtain their food from a host organism. Which is the best example of this relationship?
A bat pollinating a saguaro cactus.
A bird building a nest on a tree branch.
A flea getting nourishment from a cat's blood.
Bees visit flowers for their nectar and in the process pick up pollen, allowing flowering plants to cross-pollinate. Which term best describes the relationship between bees and flowers?
mutualism
parasitism
predator/prey
competition
In an energy pyramid, the total energy available for consumption from a trophic level to the next higher level
is reduced
is preserved
it multiplies
Which represents a short-term storage for carbon?
Coral reefs formed from calcium carbonate.
Coal formed from plants that lived long ago.
Limestone rocks quarried at Earth’s surface.
Carbohydrates stored in fruits and vegetables.
Fertilizers added by farmers to the soil contain high amounts of nitrates. How do fertilizers affect the nitrogen cycle?
More nitrates are available for plants to absorb.
More nitrates are available for animals to eat.
More nitrogen gas is released into the atmosphere.
More nitrogen is converted by bacteria into nitrates.
Throughout fossil records, many species appearing in lower layers of rock disappear in higher layers of rock. Which best explains their disappearance?
The species became extinct.
The species moved to another geographic location.
The fossil remains were disrupted by an earthquake.
Environmental conditions were not suitable for fossil formation.
What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?
gene mutation
environmental changes
selective breeding
decrease in reproduction
the bacteria that causes the bubonic plague is transmitted to humans by fleas. which term best describes the role of the fleas in transmitting bubonic plague?
decomposer
parasite
pathogen
vector
many school districts are placing dispensers of hand sanitizer in classrooms. which of the following is the MOST likely purpose?
conserve water resources
control noninfectous diseases
promote safe use of technology
limit diseases spread by contact
which has made the MOST significant difference to reduce the spread of epidemics and pandemics worldwide?
water treatment
decreased pollution
increased medical aid
which is a way the agricultural biotechnology industry could have a positive impact on the environment?
by producing crops that are virus resistant
by making robots to replace large farm machines
by reducing the need for countries to import food
how does biotechnology most benefit the economy of North Carolina?
creation of jobs
creation of hybrid plants
creation of new medicines
creation of transgenic species
how does knowledge about human genetics BEST help doctors?
doctors can remove damaged genes from a patient's body
doctors can change patients' genes to make them resistant to disease
doctors can give patients new genes to improve the health of their children
doctors can predict whether patients are at risk of developing a genetic disease
which is a positive result of the use of biotechnology in agriculture?
increased cost
increased yield
increased use of pesticides
increased use of preservatives
david tests a small amount of new drug that meets the Food and Drug Administration standards. What David's occupation?
pharmaceutical technician
pharmaceutical salesman
pharmacist
physician
which area of biotechnology would most likely create ethical issues within human society?
insulin production by bacteria
organ cloning for use in transplants
genetic engineering to improve agricultural yields
DNA and forensic testing of crime scene evidence
Many countries eat rice with little nutritional value. which one of these biotechnologies could be sued to create a more nutritional rice?
genetic modification of current rice plants
selective breeding of current rice plants
cloning of current rice plants
which is an example of scientists using biotechnology to benefit AQUAculture?
creating pest-resistant crops
making new forms of human antibiotics
developing a rot-resistant gene for trees
producing a faster-growing salmon species
