1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Crazy boy [7]
2 years ago
7

How is the earthworm beneficial to the formation of soil?

Biology
2 answers:
Sati [7]2 years ago
7 0
By their activity in the soil, earthworms offer many benefits: increased nutrient availability, better drainage, and a more stable soilstructure, all of which help improve farm productivity. Worms feed on plant debris (dead roots, leaves, grasses, manure) and soil
dedylja [7]2 years ago
5 0
By their activity in the soul
You might be interested in
A DNA fragment is introduced into the lacZ gene of a plasmid, which also contains an ampicillin resistance gene. What is the app
zhenek [66]

Answer: The bacteria transformed with this particular plasmid will form white colonies on the plates containing ampicillin and Xgal.

Explanation: The lacZ gene produces an enzyme called β-galactosidase which is responsible for the breakdown of lactose into glucose and galactose. The lacZ gene is one of the three genes (the other two being lacA and lacY) of the lac operon which is responsible for the transport and mechanism of lactose in E. coli and many other bacteria.

In recombinant DNA technology, when a plasmid is to be used to transform a host cell, such markers are used to help screen the transformed cells from the ones that have not taken up the plasmid. Xgal present in the plates is an artificial substrate which is hydrolyzed by

β-galactosidase into 5-bromo-4-chloro-indoxyl which will dimerize and oxidise into 5,5'-dibromo-4,4'dichloro-indigo. This is a blue pigment which will give blue color to the bacterial cells. Introducing a DNA fragment in this lacZ gene will make it non-functional so it will not be able to produce the enzyme.

Therefore, when a bacterial cell is transformed with a plasmid containing ampicillin resistance gene and a DNA fragment introduced in the lacZ gene and then grown on plates containing ampicillin and Xgal, white colored colonies will appear. The white colonies will show the bacterial cells that have successfully taken up the plasmid with the DNA fragment incorporated in the lacZ gene as this will render the gene non-functional and will not produce β-galactosidase which will breakdown Xgal to give blue colonies. Since the plates contain ampicillin, only the bacterial cells that have been successfully transformed with the plasmid ( the ones that have the DNA fragment and the ones without it) will grow as the ampicillin resistance will give them resistance against ampicillin in the plates. The bacterial cells that have not taken up the plasmid will not be resistant to ampicillin and will not form colonies on the plate.

This is called blue-white screening which is used to identify successfully transformed host cells. A picture of this is given in the attachment, taken from the following website:

https://www.mun.ca/biology/scarr/Blue_&_White_Colonies.html

8 0
3 years ago
Is the fungus more closely related to a plant or animal?<br><br> plant<br><br> animal
Hitman42 [59]

Answer:

animal is the correct answer.

Explanation:

The fungus is more closely related to animals than to plants because of the following reasons:

  • fungus are heterotrophs that mean they are not able to make their food like animals.
  • The fungus is closely related to animals that have signified defined by molecular phylogenetic analyses.
  • Fungi have chitin in their cell wall like animals.
5 0
2 years ago
A magnifying glass is an example of which type of microscope?
xenn [34]
A magnifying glass is an example of a simple microscope. The correct answer is will be D, simple microscope. 
3 0
3 years ago
Read 2 more answers
Which list describes the path oxygen takes to the lungs?
mafiozo [28]
The oxygen molecules moves through the nostrils, pharynx, trachea, bronchus, smaller and smaller branches of the bronchial tree, and then into the alveolus.
7 0
3 years ago
Read 2 more answers
Many plants obtain glucose from
Andrew [12]

Answer:

\boxed {\boxed {\sf Photosynthesis}}

Explanation:

Plants, algae, and some kinds of bacteria have the ability to photosynthesize. They have special organelles called chloroplasts.

These organelles are the site of <u>photosynthesis</u>. They contain green pigment known as chlorophyll which can capture sunlight. The light energy plus carbon dioxide and water are converted into glucose and oxygen.

The glucose becomes the organism's food and energy source, but the oxygen is just released as a waste product.

8 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ME PLEASE!!!
    8·1 answer
  • Offspring that result from crosses between parents with different traits are called
    8·1 answer
  • Discuss the concept of fluoroscopically guided positioning and explain why this is an unacceptable practice.
    15·1 answer
  • Which of the following best describes the relationship between genes, chromosomes, and DNA
    13·2 answers
  • PLZ HELP! WILL GIVE BRAINLIEST!
    14·1 answer
  • There are 5 major types of asexual reproduction. Name all 5 and give an example of each.
    5·2 answers
  • Explain why a triple bond between two nitrogen atoms is stronger than a double bond between two oxygen atoms
    11·1 answer
  • How can we protect the world's biodiversity??
    9·1 answer
  • The leave of a plant fold inward when it touched as a way to defend themselves from potential harm. What kind of response do the
    10·1 answer
  • Which liquid would be the most difficult to raise or lower the temperature of?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!