Question

7.
what is the major abiotic factor that plants have to adapt to for each different biome?
the presence of decomposers
a
the amount of water available
the amount of radiation
the presence of isotopes
8.
which of these have the least effect on climate?
latitude
a
altitude
water
phosphorous
9.
which of these best describes a biome?
a system formed by the abiotic factors on an ecosystem such as light, water, and temperature
a
a large region characterized by a specific type of climate and certain types of communities
the gaseous envelope surrounding the earth including precipitation and pressure
the vast body of water that surrounds almost three fourths of the earths surface
10.
the weather conditions such as temperature, precipitation, humidity, and winds in an area over a long period of time is the ______.

Explanation:

Question 7

Abiotic factors are non - living components. Decomposers are biotic (living), so option A is out. Isotopes have little direct relation to plant adaptation in biomes, so option D is out. Radiation amount is relatively less of a major adaptive factor compared to water availability. Different biomes (like desert vs. rainforest) have very different water availability, and plants adapt strongly to that. So the correct option is the one about the amount of water available.

Latitude affects climate (e.g., equator vs. poles), altitude affects climate (e.g., mountains have different climates at different heights), and water (like oceans, lakes) affects climate (e.g., coastal vs. inland). Phosphorous is a nutrient mainly related to ecosystem productivity and nutrient cycles, not a major climate - determining factor. So phosphorous has the least effect on climate.

Option A describes abiotic factors of an ecosystem, not a biome. Option C describes the atmosphere. Option D describes the hydrosphere. A biome is a large region with a specific climate and characteristic communities (like tundra biome with cold climate and specific plants/animals). So option B is correct.

Answer:

B. The amount of water available

Question 8