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aivan3 [116]
3 years ago
12

Describe how nitrogen in proteins in dead leaves is recycled to be absorbed by plants? Please help!

Biology
1 answer:
Reptile [31]3 years ago
3 0

Answer:

stages of the nitrogen cycle

1. Nitrogen-fixation

Legume plants such as peas, beans and clover contain nitrogen-fixing bacteria. These bacteria live in swellings in the plant roots called nodules. Nitrogen-fixing bacteria convert nitrogen gas from air into a form that plants can use to make proteins.

Free-living nitrogen-fixing bacteria are also found in the soil. When they die the nitrogen they have fixed into their biomass is converted into ammonium.

2. Feeding

Animals consume plant protein, digest it using specific enzymes and absorb the free amino acids.

3. Production of nitrogenous waste products

Animals cannot store excess protein in their bodies. They break it down and turn it into waste products and excrete them from their bodies.

4. Decomposition

Decomposers (some free-living bacteria and fungi) break down animal and plant proteins (from dead organisms) and nitrogenous waste products to release energy. As a result of decomposition nitrogen is released into the soil in the form of ammonium.

5. Nitrification

A group of free-living soil bacteria called nitrifying bacteria convert ammonium into nitrates in order to obtain energy.

6. Uptake of nitrates

Non-legume plants absorb nitrates from the soil into their roots and use the nitrates to produce their proteins.

7. Denitrification

This is when bacteria in the soil convert the nitrate back into nitrogen gas which then gets released back into the atmosphere.

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The modern synthesis brought together Darwin's theory of evolution with Mendelian genetics. Why was this so important?
MakcuM [25]

Answer:

Option C

Explanation:

Options for the question are

a.  It demonstrated that nothing in biology makes sense except in the light of evolution.

b.  It demonstrated that species arise from other species.

c.  It provided a quantifiable mechanism to explain gradual evolutionary change.

d.  It was the first time that change in biological organisms was observed.

e.  It was not very important to evolutionary biology.

Solution -

The term modern synthesis by coined by Julian Huxley and the goal of this synthesis was to understand and determine how genetics bring evolutionary changes in a population and with this objective it combined the Darwin’s theory of evolution and Mendel’s work on heredity. Later on scientist Dobzhansky under this synthesis found that genetic mutation causes variation through the process of natural selection and hence lead to evolutionary changes in a population even if they are isolated for a long time.  

Hence, option C is correct

3 0
3 years ago
You have two substances. Alcohol: density 0.8 g/ml and Glycerin: density
pshichka [43]

Answer:

The alcohol will float

Explanation:

Alcohol is less dense than water, compared to Glycerin which is more dense than water, (Water's density is 1.0)

7 0
3 years ago
Viral DNA makes mRNA by the process of _____. Viral DNA makes mRNA by the process of _____. replication infection translation ly
Pachacha [2.7K]
<h2>The correct answer is: Transcription.</h2>

Explanation:

  • Viruses do not possess any machinery necessary for the purpose of their reproduction.
  • They only possess their genetic material enclosed within a capsid structure.
  • The capsid is constituted of glycoproteins.
  • They completely depend upon the components and organelles of the host cells whom they infect to help them carry out their reproduction process.
  • After infecting a host cell, the viruses hijack all the machinery and components of the host cell and use them for the purpose of transcribing their genetic material (DNA or deoxyribonucleic acid) to produce the virus-specific mRNAs (messenger Ribonucleic Acid).
  • These mRNAs are further translated into virus-specific proteins using the host-specific Ribosomes. These virus-specific proteins are required for replicating the viral genetic material and producing the capsid structure.
  • The virus-specific proteins and glycoproteins are synthesized by utilizing the raw materials from the host cells.
  • Transcription is the process by which an enzyme called RNA polymerase or DNA dependent RNA polymerase copies the protein coding region of the DNA (gene) in the form of an RNA sequence (mRNA).
  • The synthesis of the mRNA happens in the 5' to 3' direction. This mRNA is further recognized and converted into the amino acid sequence with the help of the Ribosome.
  • The amino acid sequence folds to give rise to the protein.
3 0
3 years ago
What is the primary function of ground tissue?
VikaD [51]

Answer:

While epidermal tissue mediates most of the interactions between a plant and its environment, ground tissue conducts the basic functions of photosynthesis, food storage, and support.

5 0
3 years ago
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