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
Flura [38]
4 years ago
12

Simple, prokaryotic organisms have been on Earth for over 3 billion years and have been able to grow and evolve into many differ

ent and successful prokaryotic organisms. Which structure evolved in cells approximately one billion years ago that allowed for the forming of more complex, multicellular organisms? A) nucleus B) ribosome C) plasma membrane D) golgi apparatus
Biology
2 answers:
Ierofanga [76]4 years ago
8 0
It would be the nucleus because it stores all the DNA for the cell.
kondor19780726 [428]4 years ago
5 0

The answer is A. Good Luck!

You might be interested in
Identify the processes that occur during the electron transport chain.
Bogdan [553]

Answer:

Electrons are removed from Nadh and Fadh2

Explanation:

they are removed to make more ATP.

7 0
3 years ago
Are vestigial organs homologous or analogous? Explain.
sergiy2304 [10]

Answer:

Vestigial organs are a type of homologous organs.

Explanation:

Vestigial organs are rudimentary in present organisms. Vestigial organs such as wisdom teeth,nictating membrane of eyes,body hairs,which were functional organs in ancestors. Though they are present in an organism in reduced form but are functionless.

Examples of vestigial organs:

1.  Human tail or appendix,

2. Pelvic bone of a snake

3. Wings of flightless birds

4.Male breast tissues and nipples

7 0
3 years ago
The coefficient of viscosity of blood is directly proportional to the frequency of interactions of erythrocytes with the vessel
Fed [463]

The coefficient viscosity is the resistance for blood to flow. There is a direct relationship between vessels diametre and viscosity. In the attached files it is the graph that best describes this relationship.

<h3>What is blood viscosity?</h3>

Viscosity is the property of fluids to resist the tangential displacement of molecule layers.

Blood viscosity refers to the resistance for blood to flow. Blood viscosity depends on the blood density and the vessel diameter.

  • Viscosity increases when the number of blood cells increases and when more cells get in contact with vessels walls.

The more viscose is in the blood, the greater resistance there is to move it, and the more blood pressure it requires to flow through vessels.

  • Viscosity decreases when blood velocity increases.

According to this framework and to the problem statement, we could assume that

  • smaller vessels ⇒ faster flow ⇒ less wall resistance → less vistosity
  • bigger vessels ⇒ slower flow ⇒ more wall resistance → more viscosity

In smaller vessels, blood flow is greater and more cells move in the center, leading to fewer cells interacting with walls. There is higher pressure and less resistance for blood to flow.  

In bigger vessels, blood flow is slower, and more cells are interacting with each other and with the vessel walls. There is lower pressure and more resistance for blood to flow.  

Since <em>the </em><em>coefficient of viscosity</em><em> is directly proportional to the frequency of interactions</em><em> </em><em>of </em><em>erythrocytes</em><em> with the </em><em>vessel walls, </em>we can assume that blood flowing through bigger vessels express a higher coefficient of viscosity than blood flowing through smaller vessels.

In the attached files you will find an image representing the relationship between the coefficient of viscosity and vessel diameter.

You should compare this image with your images and choose the correct one.

You will learn more about coefficient of viscosity of blood at

brainly.com/question/8321796

brainly.com/question/25607771

6 0
3 years ago
When calculating a population’s ecological footprint, one has to take into account the average height of the people in the popul
Alik [6]
Asdfghjklkjhgfdsdfghjkl;kjhgfdsdfghjkl;
4 0
3 years ago
Why do bacteria like high risk foods?
Rasek [7]
It is because it's easy for them to propagate there.......
8 0
3 years ago
Other questions:
  • Which part of a river would have animals with very muscular bodies and adaptations that let survive in turbulent water? Source z
    11·2 answers
  • What’s the difference between a standing defense and an induced defense?
    9·1 answer
  • All of the following show density and buoyancy EXCEPT
    8·1 answer
  • The organelles that are known as the power plants or the powerhouses of the cell are the?
    5·1 answer
  • What is an easy way to calculateThe amount of energy available at each trophic level
    11·1 answer
  • What is the answer to this!?​
    9·1 answer
  • In order for an ecosystem to be balanced, the number of producers must be _____.
    5·1 answer
  • Cells____ in order to create cells that perform specific functions​
    11·1 answer
  • Refer to the diagram to complete the sentence with the
    10·2 answers
  • Someonee helpp pleaee with the questions
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!