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
Stells [14]
1 year ago
10

Suzanne Simard and colleagues knew that the same mycorrhizal fungal species could colonize multiple types of trees. They wondere

d if the same fungal individual would colonize different trees, forming an underground network that potentially could transport carbon and nutrients from one tree to another (S. Simard et al. 1997. Net transfer of carbon between mycorrhizal tree species in the field. Nature 388: 579-82 ). Pots containing seedlings of three different tree species were set up and grown under natural conditions for three years (Fig. A). Two of the three species (Douglas fir, birch) could form ectomycorrhizal connections with the same fungal species, but the third species (cedar) could not form an ectomycorrhizal connection with the fungal species. In some of the pots, the researchers placed airtight bags over the Douglas fir and birch seedlings and injected carbon dioxide made from carbon-13 into the bags with the Douglas fir and carbon dioxide made from carbon-14 into the bags with the birch. ¹³C and ¹⁴C are different isotopes of carbon that can be detected and measured by researchers.) As the seedlings photosynthesized, the carbon dioxide was converted into sugars that could be tracked and measured by the researchers. The researchers measured whether the sugars in each plant contained only the carbon isotope that was in the air of their plastic bag or also the carbon isotope from the air around the other plant. Simard et al. (1997) further hypothesized that if reciprocal transfer did occur, it would be a source-sink relationship driven by photosynthetic rates. That is, if one seedling is in full sun and the other in deep shade, there will be a net movement of carbon from the seedling in full sun to the one in deep shade. If a shade were placed over the birch seedlings and the cedar, and the Douglas fir was left in full sun, what result could Simard and colleagues expect? A. More ¹³C would be found in the birch than ¹⁴C in the Douglas fir. B. The amounts of ¹³C and ¹⁴C would be equal in the Douglas fir and in the birch. C. The most ¹³C would be found in the cedar. D. The most ¹⁴C would be found in the cedar.
Biology
1 answer:
posledela1 year ago
6 0

A) More 13C would be found in the birch than 14C in the Douglas fir, is the correct option.

<h3>What is Carbon-14?</h3>

Carbon-14 (14C) or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

Its presence in organic materials is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date archaeological, geological and hydrogeological samples.

Carbon-14 was discovered on February 27, 1940, by Martin Kamen and Sam Ruben at the University of California Radiation Laboratory in Berkeley, California. Its existence had been suggested by Franz Kurie in 1934.

<h3>What is Carbon-13?</h3>

Carbon-13 (13C) is a natural, stable isotope of carbon with a nucleus containing six protons and seven neutrons. As one of the environmental isotopes, it makes up about 1.1% of all natural carbon on Earth.

To learn more about Carbon-13: brainly.com/question/15131632               #SPJ4

You might be interested in
Plz help I can’t get the answer for prompt 1. The letters “T” &amp; “A” are in bold font. I’ll give brainliest and Thanks!
Leto [7]

Answer:

I think the cauae of substitution they involve swapping of one nucleotide for another during DNA repliction.For example,during repliction,a thymine nucleotide might be inserted in placed of a guanine nucleotide

4 0
2 years ago
Which of the following activities required the most commercially produced power?
Talja [164]

Answer:

<h2>Which of the following activities required the most comercially produced power?</h2>

<h3>A.Heating a new home</h3>

B.Heating an old home

C.Heating a car

D.Building a fire

My answer is letter A. Heating a new home

Explanation:

<h2>Please don't delete my answer :(</h2>

<h2>#Princesses Rule</h2>
4 0
2 years ago
How many genders are there?<br> A: 2<br> B: 2 <br> C: 2<br> D: Only 2
Brums [2.3K]

Answer:

2+

Explanation:

the world doesn't need transphobic and homophobic people.

6 0
3 years ago
Read 2 more answers
Which scenario describes a way that an abiotic factor can impact a marine system? Liquid water turning into solid ice encourages
Sloan [31]

Answer:

Rapid increases in water temperature cause extensive fish kills

Explanation:

Biotic factors are all living organisms that contribute to an ecosystem. On the other hand, abiotic factors are non-living factors, such as climatic factors (temperature, rainfall, wind), edaphic factors (soil type, soil texture, soil aeration etc). Changes of abiotic factors can have a huge influence on living organisms of ecosystem. The effects might be benefical or harmful.

Some of the most common abiotic factors that can impact a marine ecosystem are water temperature, currents, light, alkalinity, oxygent concentration etc.

4 0
3 years ago
Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. W
liubo4ka [24]

If referring to the question: Kathy was making liquid growth medium for plants. The pH of the original solution was 8. The optimal pH for plant growth is 6. What was the best compound to add to make it pH=6?

A) KOH

B) HCL

C) Water

D) No answer provided

Then the correct answer would be option B, to add HCL, known as Hydrochloric acid to lower the pH to 6.

In science, pH is a scale used to measure the acidity of a solution or its basicity. The scale ranges from 0 to 14. A pH of 7 would mean that the given solution is neutral, lower than 7 equates to an acidic solution, while anything above 7 becomes increasingly basic.

Option A is to add KOH, or potassium hydroxide to the original solution whose starting pH is 8. KOH is a solution whose pH is above 8,  a strong base, and is often used to increase the pH of a solution. In the question it states what the desired pH is 6, therefore we want to lower, not increase the pH. This makes option A incorrect.

Water is a neutral solution. Even though it is neutral, it is not used to neutralize basic or acidic solutions. Acid or bases may be added to water to create very diluted solutions that are nearly neutral despite containing a strong base or acid, but this is a different process than neutralization and will not give the desired pH. Option C is also wrong.

Option B is correct because HCL, known as hydrochloric acid is a strong acid, commonly used to lower the pH of a solution by increasing the concentration of hydrogen ions. Since we start with a pH of 8 and wish to achieve a pH of 6, HCL is the correct component to add to the solution. Due to option B being correct, option D that states that no answer is provided, is incorrect.

For more on pH visit:

brainly.com/question/491373?referrer=searchResults

8 0
3 years ago
Other questions:
  • Which step is the first step in the scientific method sociology?
    7·1 answer
  • What are some ways animals see or hear differently than humans?
    11·2 answers
  • While analyzing a sample of pond water, you discover a new organism whose body is composed of multiple cells. Upon closer inspec
    14·1 answer
  • WILL REWARD WITH 5 BRAINLIESTS/DUE TODAY/NEED HELP<br> biology
    5·1 answer
  • Glycogen is a _____ but carbonic acid, acids, and oils are not.
    14·1 answer
  • Please Help Will Mark Brainliest what are good questions to ask when you are comparing the climate and weather of two cities on
    7·1 answer
  • Will give brainliest plz help
    10·1 answer
  • Can similar mineral composition be found in rocks both the Rocky Mountains and the Great Plains even though the rocks look so di
    13·1 answer
  • Chemical compounds....... please help . it's due in 2 hours ​
    8·1 answer
  • I do not understand these questions, please help!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!