In which situation would a snake be expected to have the largest size?
A. restricted space, inadequate food
B. lots of space, large supply of food
C. restricted space, large supply of food
D. lots of space, inadequate food
B. lots of space, large supply of food
In this situation, the snake would have ample space to grow and move around, as well as a plentiful food source to support its growth and size.
Which experimental procedure would provide the best evidence for the effect of light on plant growth?
A. Measure plants receiving different amounts of light in their natural environments.
B. Plant seeds in different soils and expose them to different amounts of light, then measure plant growth.
C. Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
D. Measure plants of the same variety grown in environments that receive different amounts of light.
C. Plant seeds of the same variety in the same conditions and vary only the amount of light, then measure plant growth.
By keeping all other variables constant and only changing the amount of light the plants receive, any differences in plant growth can be more confidently attributed to the specific effect of light on the plants.
A family raises a species of fish in a pond. At the end of each summer, the family sells the fully grown fish. One year, the family notices that the fish are smaller than they had been the previous year. Which statement best explains this observation?
A. There was less food available in the pond this year than last year.
B. The type of fish in the pond this year tended to be smaller than the type of fish last year.
C. There was more space in the pond this year than last year.
D. There were fewer fish this year than there were last year.
A. There was less food available in the pond this year than last year.
The reduced size of the fish compared to the previous year could be due to a lack of food available in the pond, which would affect the growth and development of the fish.
A species of plant grows poorly in the shadow of a building. Which environmental need is the plant most likely lacking?
A. space
B. water
C. sunlight
D. nutrients
C. sunlight
Plants require sunlight for photosynthesis, the process by which they produce energy and grow. If a plant is growing poorly in the shadow of a building, it is most likely lacking sufficient sunlight for optimal growth.