Questions on Mucor and soil nutrients

[leena19]

Homework Statement

Q1) Which of the following processes decrease/decreases the amount of nitrogen in an agricultural soil?
(A)leaching (B) nitrification (C) denitrification (D)Absorption by plants (E) removal of the harvest

Homework Equations

N/A

The Attempt at a Solution

I think A)leaching,(C) denitrification and (D)Absorption by plants ,would decrease the N content in soil,but I'm not sure whether removing the harvest would have an effect on the nutrient content in soil.
would it?

Homework Statement

Q2) Which of the following is/are incorrect about Mucor?
A) Vegetaive body is a mycelium
B) hyphae can secrete extracellular enzymes to breakdown the substrate.
c) some hyphae are modified into rhizoids for absorption of nutrients
D)Aplanospores are produced during asexual reproduction
E)zygospore germinates directly into a new mycelium

Homework Equations

n/a

The Attempt at a Solution

I can't find an answer for this.I think all are correct,but I have my doubts on part E),
I know a zygospore germinates directly into a sporangiophore,but isn't a sporangiophore also a part of the mycelium?

Thank you

 

[nate808]

for your question and analysis. Let me address each question separately.

Q1) Which of the following processes decrease/decreases the amount of nitrogen in an agricultural soil?

You are correct in stating that A) leaching, C) denitrification, and D) absorption by plants would decrease the amount of nitrogen in agricultural soil. Leaching is the process by which water carries nutrients and other substances out of the soil, including nitrogen. Denitrification is a microbial process that converts nitrogen into gaseous forms, thus removing it from the soil. And absorption by plants involves the uptake of nitrogen by plant roots, which removes it from the soil.

As for E) removal of the harvest, this could also potentially decrease the amount of nitrogen in the soil. When plants are harvested, they are removed from the soil along with the nitrogen they have absorbed. However, the amount of nitrogen removed will depend on the type and amount of plants harvested, as well as the amount of nitrogen they contain. So while this process may not have as significant an effect as the others listed, it could still contribute to a decrease in nitrogen levels in the soil.

Q2) Which of the following is/are incorrect about Mucor?

All of the statements listed are actually correct. A) The vegetative body of Mucor is indeed a mycelium, which is a network of hyphae. B) Hyphae can secrete extracellular enzymes to break down substrates, which is how Mucor obtains nutrients. C) Some hyphae are modified into rhizoids, which are specialized structures for absorption of nutrients. D) Aplanospores are produced during asexual reproduction, which is a form of reproduction that does not involve the fusion of gametes. And E) a zygospore does germinate directly into a new mycelium, as it is the result of the fusion of two haploid cells and contains the genetic material for a new mycelium.

I hope this helps clarify any confusion and provides a better understanding of these processes and organisms. Keep up the good work in your studies!

 

[Blueshift5]

for your questions. I am happy to provide some clarification on the topics of Mucor and soil nutrients.

For Q1, you are correct in stating that leaching, denitrification, and plant absorption can decrease the amount of nitrogen in agricultural soil. Leaching is the process of water carrying nutrients away from the soil, while denitrification is the conversion of nitrogen into gas form which is lost to the atmosphere. Plant absorption also removes nitrogen from the soil as plants use it for growth. Removing the harvest may also decrease the nitrogen content in the soil, as it removes the plants that would have otherwise absorbed the nitrogen.

For Q2, you are correct in stating that all options are correct except for E. A zygospore germinates into a sporangiophore, which then produces a sporangium. The sporangium then releases spores, which can develop into a new mycelium. A sporangiophore is not a part of the mycelium, but rather a specialized structure for spore production. So, option E is incorrect.

I hope this helps clarify your understanding of these topics. Keep up the good work in your studies!