Question

1. a severe drought reduces the amount of plant life in an area. which of the following best describes the ecological impact of this event and what level of organization it affects? sev1c / dok 2

a. the drought affects the population, because it reduces the number of organisms of a single species
b. the drought affects the community, because it changes the interactions between different species
c. the drought affects the ecosystem, because a lack of precipitation impacts the organisms in the region while also lowering soil erosion
d. the drought affects the biosphere, because it represents a change in the climate of all biomes

1. which of the levels of ecological organization is the first to include the biotic and abiotic components of the area? sev1a / dok 1

a. biosphere
b. community
c. ecosystem
d. population

1. plants in this biome have a shallow root system, small leaves, and experience a very short growing season. other adaptations that help them survive include growing close together and low to the ground. identify the statement that best explains the biome in which these plants live. sev1d / dok 2

a. these plants live in the temperate grassland where there is a rainy and a dry season. growing close together and low to the ground protects them from the harsh winds that come from a lack of trees.
b. these plants live in the tropical rainforest, where shallow roots help them to adapt to life on the forest floor and growing close together and low to the ground allows them to share available resources.
c. these plants live in the tundra, where water is scarce and the small leaf surfaces help to minimize water loss. permafrost prevents roots from growing deeper into the soils. growing close together and low to the ground protects them from the extreme cold and harsh winds.
d. these plants live in the desert, where water is scarce and the small leaf surface helps minimize water loss. shallow roots help them to get any available surface water and growing close together and low to the ground protects them from the harsh weather conditions.

Explanation:

1. An ecosystem is a community of living organisms in conjunction with the non - living components of their environment. A severe drought impacts both the organisms (biotic) and the non - living aspects like soil moisture (abiotic) in a region, so it affects the ecosystem.
2. The ecosystem is the first level of ecological organization that includes both biotic (living organisms) and abiotic (non - living, like air, water, soil) components.
3. Tundra plants have adaptations such as shallow root systems due to permafrost, small leaves to minimize water loss, and grow close together and low to the ground to protect from extreme cold and harsh winds.

Answer:

1. C. The drought affects the ecosystem, because a lack of precipitation impacts the organisms in the region while also lowering soil erosion.
2. C. Ecosystem
3. C. These plants live in the tundra, where water is scarce and the small leaf surfaces help to minimize water loss. Permafrost prevents roots from growing deeper into the soils. Growing close together and low to the ground protects them from the extreme cold and harsh winds.