Question

7.
which of these happens first in the sequence of events used to illustrate zero population growth?
○ the offspring as adults, reproduce one offspring each a
the parents die
the population size returns to what it was in year x
two adults produce two offspring in year x

1. a road map is an example of a ______ model.

○ all of these are correct a
mathematical model
conceptual model
graphical model
9.
humans are affecting the carbon cycle by which of the following?
○ the use of cars, factories, and power plants that rely on a fossil fuels
burning fossil fuels
all of these are correct
destroying vegetation that absorbs carbon dioxide

1. thin soil, high humidity, and high rainfall represent a

○ temperate deciduous forest. a
tropical rain forest.
desert.
grassland.

Explanation:

1. Zero population growth starts with the initial reproductive event of adults producing offspring, which sets the sequence in motion.
2. A road map visually represents geographic information, fitting the definition of a graphical model; it is not a mathematical or conceptual model.
3. Human activities including burning fossil fuels (via cars/factories/power plants) and destroying carbon-absorbing vegetation both disrupt the carbon cycle, so all listed options are correct.
4. Tropical rain forests are characterized by thin, nutrient-poor soil, high humidity, and extremely high annual rainfall.

Answer:

1. D. Two adults produce two offspring in year x
2. D. Graphical model
3. C. all of these are correct
4. B. tropical rain forest.