Question

what is the highest level of ecological organization encompassing the earths ecosystems?
a. biosphere
b. population
c. biome
d. community

what defines an individual within an ecosystem?
a. geographical area
b. single organism
c. interaction with other species
d. population size

what represents a biotic factor in an ecosystem?
a. temperature
b. sunlight
c. bacteria
d. soil

what is a crucial function performed by ecosystems?
a. resource depletion
b. habitat destruction
c. energy pollution
d. pollution control

how do ecosystems contribute to nutrient cycling?
a. by isolating different species from one another
b. through the continuous movement of elements like carbon and nitrogen
c. by absorbing pollutants and increasing soil erosion
d. by limiting the growth of plant species

which of the following best describes a biome?
a. the interactions between different species
b. a large geographical area with specific climatic conditions
c. a single organism in an ecosystem
d. the total number of species in an area

in the context of symbiotic relationships, what characterizes parasitism?
a. both species benefit
b. one species benefits at the expense of another
c. both species are harmed

Explanation:

• First question: The biosphere is the global sum of all ecosystems.
• Second question: An individual in an ecosystem is a single organism.
• Third question: Biotic factors are living components; bacteria are living.
• Fourth question: Ecosystems help in pollution control (e.g., wetlands filtering pollutants).
• Fifth question: Nutrient cycling involves continuous movement of elements like carbon and nitrogen.
• Sixth question: A biome is a large geographical area with specific climatic conditions.
• Seventh question: In parasitism, one species benefits at the expense of another.

Answer:

a. Biosphere
b. Single organism
c. Bacteria
d. Pollution control
b. Through the continuous movement of elements like carbon and nitrogen
b. A large geographical area with specific climatic conditions
b. One species benefits at the expense of another