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3 years ago

Why is sustainability a problem in agriculture crops ?

Biology

2 answers:

Olenka [21]3 years ago

6 0

I’m assuming because for some crops they need a certain amount of acidity

bulgar [2K]3 years ago

4 0

Despite this positive assessment, the country's sustainable agricultural development has encountered many obstacles. These include: agricultural water-use shortage; cultivated land loss; inappropriate usage of fertilizers and pesticides, and environmental degradation

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What is decreased when lactase is added to milk?

irinina [24]

The answer is A.
Lactose is known as milk sugars.
Therefore giving you your answer- sugars add sweetness.

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4 years ago

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Earth’s layers are determined by their physical properties and chemical composition. In the lesson, you learned about each of Ea

Mkey [24]

Answer:

Generally, the Earth is divided into spheres which include the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air). The earth is divided into three layers based on chemical composition and these are the core, mantle and crust. In addition, the earth is also divided into physical properties which include lithosphere, athenosphere, mesosphere, outer core and inner core. Based on the given details, we can conclude that the atmosphere cannot be part of the lithosphere but instead, it is classified in a separate layer. The lithosphere only consists the outermost, rigid part of the Earth, which are the crust and the mantle. Hope this answer helps

Explanation:

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3 years ago

Knowing what tetanus toxin does to motor neuron activity, predict what would happen to the concentration of acetylcholine in the

jekas [21]

The tetanus is a disease caused by the bacterium Clostridium tetani. The Clostridium tetani is a normal inhabitant of the soil and can easily contaminate dirty wounds, especially those due to farm practices. In the body, these bacteria produce a toxin called tetanospasmin. The toxin enters the central nervous system which is the brain and spinal cord where it blocks the mechanisms that inhibit motor neurons from firing when a muscle is relaxed. With this inhibition removed, the neurons fire repeatedly and continually stimulates the muscle, causing painful and increasingly stronger muscle spasms. The masseter or jaw muscles are often the first muscles involved, and it is the spasm of these muscles that gives rise to tetanus' common name lockjaw, also called trismus. The muscles of the face, neck, back, and proximal limbs are also commonly affected. The contraction of the facial musculature leads to a characteristic facial expression with a teeth-baring grin and raised eyebrows. Contraction of the back muscles may cause the back to arch posteriorly.

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3 years ago

How are scientific processes important in solving problems? Give an example and EXPLAIN how these processes make solving this ex

xeze [42]

Scientific process

A step by step procedure of solving a problem is known as scientific process.

Explanation

To solve a problem following steps should be followed: Identification of problem through observation, Development of hypothesis, Experimentation to test hypothesis, Analyze the result of experiment, Conclusion to choose the best possible solution.

Example

1. Identification of problem through observation

Development of agriculture industry lead to soil pollution in the form of heavy metals which cause serious pose to human health. Data collected from environmental department show that heavy is adding day by day in the form of sewage drained from industries in to water, which has also affected aquatic life.

2. Development of hypothesis

Many strategies have been developed for cleaning or removal of heavy metals from soil such as cultivation of heavy metal tolerant plants, installation of plants which filter sewage water before entering into water table, use of bacteria that clean soil from heavy metals.

3. Experimentation to test hypothesis

To test hypothesis and experiment will be set up based on above mentioned method. However main focus should be given on cost, time and environmental friendly approach. To grow heavy metal accumulator plants will cost less but time consuming and after harvesting if their biomass is disposed off, it will again add heavy metals to soil. It is cost effective but time wasting process. Installation of plant to filter sewage is better method but it is cost effective and filter should be changed after a month which cost too much. The use of heavy metal tolerant bacteria is not too costly and once when they enter to soil having heavy metals will absorb heavy metals and will convert them into less toxic form. These bacteria will also reproduce and produce more offspring which will help in cleaning of soil

4. Analyzing result

It was observed in the results that use of plant of clean heavy metal is time wasting process. Similarly, installation of plant is also cost effective, however the use of bacteria for remediation of heavy metal is less costly and not harmful for environment.

5. Conclusion

It was concluded from results that bacteria should be applied for bio remediation purposes.

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3 years ago

Why does Mercury lack seasons?

shutvik [7]

ANSWER IS C “the distance from the sun makes seasons impossible “

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3 years ago

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