A) Matter is made up of atoms. B) Soil is made up of tiny rocks and organic material. C) Organisms exist that are too small to see with unaided eyes. D) Living things are made up of cells.
A) Organisms from the islands moved to the mainland and evolved B) The organisms on the mainland and the islands were unrelated C) All the organisms originated in North America and migrated D) A few mainland organisms populated the islands and evolved over time
A) Circulatory system B) Digestive system C) Nervous system D) Excretory system
A) The seeds are responding to the sunlight. B) The seeds are responding to the touch of the surrounding soil. C) The seeds are responding to the chemicals in the leaves and flowers. D) The seeds are responding to gravity.
A) The model is simpler than the processes taking place in the natural world. B) The model is more complex than the processes taking place in the natural world. C) The model accurately shows the relationship between the parts of the system. D) The model does not accurately show the relationship between the parts of the system.
A) The pond ecosystem included few producers. B) The pond ecosystem contained too few consumers. C) The algae were living in the runoff before it entered the pond. D) The runoff contained a nutrient for the pond ecosystem.
A) She has made a model to show how the nervous and circulatory systems move blood. B) She has made a model to show how the muscular and skeletal systems produce movement. C) She has made a variable to show how the nervous and circulatory systems move blood. D) She has made a variable to show how the muscular and skeletal systems produce movement.
A) Air sacs B) Gills C) Tracheal tubes D) Lungs
A) carbohydrates. B) radiant energy. C) chemical energy. D) water and carbon dioxide.
A) By reusing B) By composting C) By bagging D) By burning
A) carbon B) phosphorus C) nitrogen D) oxygen
A) To tear and grind food into smaller pieces B) To act as a catalyst in a chemical reaction C) To break down large molecules into smaller molecules that the body can use D) To alter the temperature of the digestive system
A) Holding a door shut so your sister cannot get into your room B) Raking leaves into a large pile C) Hanging from a monkey bar on the playground D) Standing motionless
A) adaptation B) pioneering succession C) secondary succession D) emigration
A) they cause waves to break offshore. B) they cause the tides to go higher. C) the roots of dune plants hold sand in place. D) they prevent people from walking on the beach.
A) They are about the same size as Earth and are made mainly of iron B) They are much larger than Earth and are made mainly of iron. C) They are much larger than Earth and are made mainly of the gases hydrogen and helium. D) They are about the same size as Earth and are made mainly of the gases hydrogen and helium.
A) increased gravity B) high oxygen levels C) extreme temperatures D) bright stars
A) A coral reef B) A desert preserve C) A temperate forest D) A large city park
A) The birds will eat more green individuals than red ones. The ratio of red to green individuals in the population will not change. B) The birds will eat more red individuals than green ones. More green individuals will survive to reproduce. C) The birds will eat more green individuals than red ones. More red individuals will survive to reproduce. D) The birds will eat equal numbers of red and green individuals. The ratio of red to green individuals in the population will not change.
A) Organ system B) Tissue C) Cell D) Organ
A) digestion, reproduction, and gas exchange B) excretion, transport, and gas exchange C) digestion, coordination, and reproduction D) immunity, digestion, and movement
A) Eelgrass B) Bass C) Insects D) Turtle
A) The new hydra has half of the parent’s genetic material. B) The new hydra has an exact copy of the parent’s genetic material. C) The genetic material of two parents is passed on to the new hydra. D) The new hydra looks different from the parent.
A) Chloroplast B) Cell wall C) Nucleus D) Mitochondrion
A) Physiological adaptations B) Physical characteristics C) Behavioral adaptations D) Genetic make-up |