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In: Biology

Question 1 Nitrogen and phosphorus cycles differ in what ways? (CHECK ALL THAT APPLY) -Nitrogen cycle...

Question 1

Nitrogen and phosphorus cycles differ in what ways? (CHECK ALL THAT APPLY)

-Nitrogen cycle dependent on bacteria

-Nitrogen cycle has an atmospheric component

-Phosphorus cycle has no atmospheric component

-Phosphorus enters food webs mainly through primary producers

Question 2

In terrestrial habitats species richness is negatively correlated with primary productivity

True or False

Question 3

Evapotranspiration shows a positive relationship with aboveground net primary productivity This is because

A. Evapotranspiration is the amount of water that must be exchanged for CO2

B. Evapotranspiration is negatively correlated with the number of open stomata

C. Evapotranspiration Is another way of measuring precipitation and precipitation provides the moisture plants need to grow

D.Evapotranspiration Is positively correlated with the number of open stomata and open stomata allow the plant to take in more CO2

E.Evapotranspiration is the term for CO2 absorption by leaves and plants need CO2 to create the products of photosynthesis

Expert Solution

1) Both nitrogen & phosphorus cycle enter a series of processes by which nitrogen, phosphorus & its compounds are inter-converted in the environment & in the living organisms. Though phosphorus cycle is dependent on bacteria in some extent but nitrogen cycle is mainly dependent on nitrifying bacteria. So, we can include the first option. During lightning nitrogen molecules breaks & combine with oxygen in the air forming nitrogen oxides & through rain ultimately enter in the earth. So, nitrogen cycle has an atmospheric component. Phosphorus is mostly found on unweathered rock & soil minerals & it does not enter the atmosphere. So, phosphorus cycle has no atmospheric component. As phosphorus cycle lacks atmospheric component it mainly enters to plant from soil & in turn in animals when they consume plants. So, phosphorus enters food webs mainly through primary producers. So, all options are correct.

2) Species richness is the no. of different species that are present in an ecological community or area. Where as productivity is the rate of conversion of resources to biomass per unit area per unit time. The relationship between them is unimodal (hump-shaped). So, it is not negatively correlated with each other. So, the correct option is false.

gladiator answered 1 year ago

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