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