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
andreyandreev [35.5K]
3 years ago
13

Which of the following correctly identifies the most productive layer of a soil profile?

Biology
2 answers:
DedPeter [7]3 years ago
5 0
Just below the O horizon is “topsoil” or “A” horizon.
Usually it is darker than the lower layers, loose and crumbly with varying amounts or organic matter. Plants roots, bacteria, fungi, and small animals are abundant here, and plants thrive in it. It is generally the most productive layer of soil.
atroni [7]3 years ago
4 0

Answer:

A. topsoil, just below undecomposed organic matter.

Explanation: It's the answer on edgenuity ^-^

You might be interested in
AMP-PNP is the abbreviation for a structural analogue of ATP in which the second and third phosphate groups are linked by an NH
Inessa [10]

Answer:

Explanation:

a.

Actin and myosin, two contractile proteins, make up myofibrils. ATPase activity is present in the myosin head. Troponin tropomyosin complex is displaced by calcium ions, exposing myosin's entire surrounding binding site on actin. Myosin heads execute the power stroke, and detachment of the head is needed for the second cycle. Myosin head detachment is aided by ATP binding & hydrolysis. Since the solution contains AMP-PNP instead of ATP, myosin heads are unable to hydrolyze and detach from myosin-binding sites on actin, thereby preventing contraction.

b.

The active ATPase correlated with both the dynein arms is found in cilia and flagella. Dynein is a motion motor protein family that walks around microtubules. The core of cilia is made up of microtubule bundles linked to the motor protein dynein. In the presence of AMP-PNP, the net reaction will be to stop the ciliary movement by inhibiting dynein motor proteins.

c.

Kinesins and Dyneins, two groups of motion motor proteins with ATPase activity, are involved in axonal transportation. All the motion motor proteins use energy from ATP hydrolysis to transfer secretory vesicles through microtubules. Since the inclusion of AMP-PNP does not supply electricity, vesicular transport does not occur.

7 0
3 years ago
You are performing cpr on a victim and an assisting responder arrives. Which of the following is most appropriate for the assist
Andreas93 [3]

Answer: 3. Check to see whether more advanced medical personnel have been called

Explanation: When somebody finds themselves in these kind of delicate situations where someone has collapsed and is not breathing, we use CPR because it can keep people alive until Emergency services arrive. The first step is to start helping them by giving CPR and the second step is making sure that the medical personnel is on their way because they are more eligible and experienced.

7 0
3 years ago
Why are chromosomal mutations potentially serious
ioda
They can cause Down's syndrome or some other chromosomal disorder
5 0
3 years ago
So sorry , i will give whoever does all of these brainlist . :)
Orlov [11]

1. constant speed is a steady speed from start to finish, instantaneous is not constant from start to finish.

2. The average speed of the marble is 5 m/s  (meters per second).

3. Rider 1 will arrive at the destination before Rider 2.

Hope This Helps!  : )

6 0
2 years ago
13. This diagram shows which cellular process?
Andrei [34K]

Answer:

B

Explanation:

6 0
2 years ago
Other questions:
  • The overall folding of a single protein subunit is called
    7·1 answer
  • "Methods A and B are classified as methods of passive transport because they do not require
    7·2 answers
  • In the animal kingdom today, poikilotherms outnumber homeotherms by a great margin. Why is poikilothermy a successful way of lif
    8·1 answer
  • Please answer the question. I’ll give thanks to those who help.
    13·2 answers
  • I will mark as brainiest you answer this easy question
    15·1 answer
  • For a cell to maintain the appropriate balance of materials inside and outside of the cell, materials must be able to move in an
    5·1 answer
  • In the southeastern United States, there is a small type of lizard called a fence lizard. They have short legs and live under le
    5·1 answer
  • An outbreak of food poisoning occurs at a family picnic after the growth of Staphylococcus aureus in refrigerated potato salad l
    11·1 answer
  • 9. What would need to change in order for the organism population in the example to continue
    7·1 answer
  • Why does the electron transport chain (etc) pump protons out of the mitochondrial matrix and into the space between the membrane
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!