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
pishuonlain [190]
3 years ago
7

Why does sound need a medium

Biology
1 answer:
erastova [34]3 years ago
8 0

Answer:

it may be:

C and D and B the longer the empty space the longer the sound well go

You might be interested in
How do organisms form carbon films?
Lady bird [3.3K]

Answer:

<em>when</em><em> </em><em>an </em><em>organism</em><em> is</em><em> </em><em>covered</em><em> by</em><em> </em><em>sediment</em><em>,</em><em>it </em><em>begins</em><em> to</em><em> </em><em>decay,</em><em> when</em><em> </em><em>decaying</em><em>,</em><em>the </em><em>organism</em><em> </em><em>releases</em><em> </em><em>a </em><em>gas</em><em>.</em><em>T</em><em>h</em><em>i</em><em>s</em><em> </em><em>process</em><em> </em><em>in </em><em>turns </em><em>leaves</em><em> </em><em>a </em><em>thin </em><em>film </em><em>of </em><em>carbon</em><em> </em><em>that</em><em> </em><em>preserves </em><em>part </em><em>of</em><em> the</em><em> </em><em>organisms.</em><em>T</em><em>h</em><em>e</em><em> </em><em>hallow </em><em>that</em><em> </em><em>forms</em><em> </em><em>on </em><em>the</em><em> </em><em>sediment</em><em> </em><em>is </em><em>the</em><em> </em><em>carbon</em><em> </em><em>film </em><em>that</em><em> </em><em>contain</em><em> </em><em>fossils</em><em> </em><em>of </em><em>the</em><em> </em><em>organism</em><em>. </em>

8 0
2 years ago
Which of the following are examples of positive feedback loops? (Choose all that apply)
aleksley [76]

The examples of positive feedback loops are as follows:

  1. contractions during the process of giving birth
  2. Blood clotting

<h3>WHAT IS POSITIVE FEEDBACK LOOP:</h3>
  • Positive feedback loop is that in which a change in a given direction causes additional change in that same direction.

  • The contractions during the process of giving birth is an example of positive feedback loop because the contractions further stretch the walls and continues until birthing occurs.

  • Also, the clotting of blood causes the stoppage of blood flow.

Therefore, the examples of positive feedback loops are as follows:

  1. contractions during the process of giving birth
  2. Blood clotting

Learn more about positive feedback loops at: brainly.com/question/11312580

7 0
3 years ago
To which substance does ferredoxin transfer an electron?
Sonbull [250]

The right answer is NADP+.

Ferredoxin is an iron-sulfur protein that effects electron transfer in a large number of redox reactions in cell metabolism through Fe-S clusters whose iron cations oscillate between +2 (ferrous) oxidation states. and +3 (ferric). The first protein of this type was isolated in 1962 from the anaerobic bacterium Clostridium pasteurianum. A chloroplast-specific ferredoxin is involved in the cyclic and noncyclic photophosphorylation reactions of photosynthesis. In non-cyclic photophosphorylation, ferredoxin is the ultimate electron acceptor and reduces NADP + under the action of ferredoxin-NADP + reductase (EC 1.18.1.2) with FAD and a flavin group as cofactors:

2 ferredoxin- [Fe (2+) Fe (3+) S2 (-2)] + NADP (+) + H (+) ==> 2 ferredoxin- [Fe3 (+2) S2 (-2)] + NADPH .

3 0
3 years ago
Read 2 more answers
Define a Neuron.<br>Thanks​
makkiz [27]

Answer:

According to Oxford learner's dictionary:

Neuron is defined as

<u>a specialized cell transmitting nerve impulses; a nerve cell.</u>

3 0
3 years ago
Read 2 more answers
How does a cladogram represent hypothesized evolutionary relationships?
balandron [24]

Answer:

A cladogram is used by a scientist studying phylogenetic systematics to visualize the groups of organisms being compared, how they are related, and their most common ancestors. Cladograms represent hypotheses about the evolution of organisms and are subject to revision when theories are disproved and additional data become available.

Explanation:

6 0
3 years ago
Other questions:
  • 5 sentences that you know about genetics
    12·1 answer
  • A particular species of unicellular organism inhabits the intestines of termites, where the unicellular organisms are protected
    9·2 answers
  • Cancerous tumors are divided into broad groups on the basis of the particular type of tissue from which the tumor cells arise. t
    10·1 answer
  • Question 11
    8·2 answers
  • Scientists predict that we will eventually use up all available fossil fuels. Which list includes only fossil fuels?
    11·1 answer
  • Is a key element found in all carbohydrates, lipids, proteins, and nucleic acids?
    9·2 answers
  • Solid fats have a high proportion of _____.
    11·2 answers
  • How would you define the term energy?
    10·2 answers
  • Which one is more important the prokaryotic cell or eukaryotic cell
    14·1 answer
  • Could you tell me if the answer is right?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!