Question

Question 14 pts

The soils of temperate deciduous forests rank among the most fertile in the world; their fertility is related to _____.

Group of answer choices

the large amount of leaf drop, which quickly recycles back into the topsoil

a continuous canopy during the growing season which reduces nutrient extraction by grasses and shrubs

moderate levels of rainfall which leave most of nutrients within the soil rather than leaching them out

all of the choices

average temperature ranges which promote rapid leaf decomposition and humus formation

Question 24 pts

Photosynthetic dinoflagellates

Group of answer choices

give corals their color

provide coral polyps with oxygen and sugars

all of these are true

are protected by living inside the tissues of coral polyps

none of the above - dinoflagellates are extinct

are mutualistic symbionts with coral polyps

Question 34 pts

A lake's __________ zone extends all around the shore to a depth where aquatic plants stop growing.

Group of answer choices

thermocline

limnetic

profundal

littoral

Question 44 pts

An _________________ species has population levels so low it is at great risk of extinction in the near future.

Group of answer choices

invasive

endangered

indicator

endemic

Question 54 pts

Choose the correct ranking of electromagnetic radiation types from smallest wavelength to largest.

Group of answer choices

infrared < ultraviolet < visible

ultraviolet < visible < infrared

infrared < visible < ultraviolet

visible < ultraviolet < infrared

Answer 1

1. soils of temperate decidious forests are very fertile as the large amount of leaf drop quickly recycles back to the top soil. The fallen leaves decompose and the nutrients are absorbed by the soil.

2. photosynthetic dinoflagellates are mutualistic symbionts with coral polyps. The clear waters near the equator are nutrient poor and corals donot have resource to produce energy .so they depend on the photosynthetic dinoflagellates for energy.

In turn , the dinoflagellates use the inorganic nutrients and CO₂ that are released by the corals as waste .

3. A lake's profundal zone extends all around the shore to the depth where aquatic plants stop to grow

4. Endangered species has population levels so low it is at great risk of extinction in the near future

5. The correct ranking of electromagnetic radiation types from smallest wavelength to largest is

UV< visible < IR