What is a landfill? Check all that apply.

2 answers:

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Landfill is a carefully designed structure built into or on top of the ground in which trash is isolated from the surrounding environment (such as rain and air ). This isolation is accomplished with a bottom liner and everyday it is covering with soil.

mart [117]2 years ago

3 0

Answer:

It is a structure that isolates waste from the surrounding environment.

It is a planned structure that buries trash in the ground.

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What's the difference between nitrification and dentification

Y_Kistochka [10]

Difference between nitrification and dentrification

Explanation:

Nitrification and denitrification are part of the nitrogen cycle

Nitrification is the process of conversion of ammonium to nitrate by nitrifying bacteria like Nitrobacter and Nitrosomonas

Denitrification is the process of reduction of nitrate to nitrogen gas by denitrifying bacteria like Pseudomonos, Lactobacillus etc.

Nitrifying bacteria are autotrophs and grows slowly and need aerobic condition. Denitrifying bacteria are hetertrophs and grows rapidly and need anaerobic conditions.

Nitrification requires a pH of about 6.5 to 8.0; denitrification takes place at 7.0 to 8.5

Nitrification provides soluble nitrates readily available in the soil to be easily absorbed by the roots.

Denitrification processes are used in wastewater or effluent treatment plants.

6 0

3 years ago

Which of the following are homogeneous solutions

ser-zykov [4K]

Salt water
sand and water
vinegar

this next one is for CEMENT

Concrete is a heterogeneous (composite) material consisting of cement, water, fine aggregates and coarse aggregates. ... Otherwise it is a heterogeneous material.Cement may be called a homogeneous material. But concrete is not.

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2 years ago

The crispr system involves the cas9 enzyme, which identifies specific nucleotides to be cut using a(n) ________ molecule as a gu

bonufazy [111]

Answer:

RNA

Explanation:

CRISPR system was discovered by a Japanese scientist. Naturally bacteria and many other prokaryotes have CRISPR system in their genome which they use as a self defense against a pathogen which is invading them. It consists of inter spaced, short palindromic nucleotide repeats which encode a guide RNA (gRNA). This guide RNA (gRNA) recognizes the target sequence on the pathogen. The gRNA is followed by Cas9 enzyme which along with the gRNA plays a very important role in breaking genome of the pathogen. Once the target gene is cut down the rest of the DNA can be rejoined by non homologous end joining.

But nowadays, scientists are using this system for genome editing and incorporating desired gene between the two ends which are cut down by CRISPR Cas9 system.

7 0

3 years ago

Read 2 more answers

What type of forces causes changes in motion?

sleet_krkn [62]

The answer is b equal and opposite horizontal forces

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3 years ago

Stereopsis is the ablility to associate music with vision TRUE OR FALSE

Scrat [10]

No, stereopsis is the perception of depth produced by the reception in the brain of visual stimuli from both eyes in combination. So it's false

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