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
mariarad [96]
3 years ago
10

How many generations did it take modern man to leave Africa and penetrate every corner of the globe?

Biology
1 answer:
Juliette [100K]3 years ago
6 0

Answer:

See explanation section

Explanation:

Though The first Homo Sapiens were born about 200,000 years ago, the modern man left Africa 60,000 years ago to penetrate every corner of the world. It is hard to find that the distance and time of their travel. According to the anthropologist and paleontologist, the human took nearly six hundred generations to leave their African homeland to settle the world. It is also known as ‘’The great human migration’’.

Here is the source: The Genographic Project, National Geographic Smithsonian Magazine, University of Oxford.

You might be interested in
Some bones develop within sheetlike layers of connective tissue, and they are called ______ bones. Other bones develop from a mo
Ugo [173]

Some bones develop within sheet like layers of connective tissue which are called intramembranous bones whereas the bones that are develop from a model of hyaline cartilage and are called endochondral bones.

<h3>Formation of intramembranous bones and endochondral bones</h3>

Endochondral ossification involves the replacement of hyaline cartilage with bony tissue which leads to the formation of endochondral bones whereas, intramembranous ossification refers to the replacement of sheet-like connective tissue membranes with bony tissue which results in the formation of intramembranous bones.

Learn more about bones here: brainly.com/question/412179

5 0
2 years ago
why would having both polar and nonpolar properties in a protective boundary be advantageous for the cell?
Reika [66]

Explanation:

The polar nature of the membrane’s surface can attract polar molecules, where they can later be transported through various mechanisms. Also, the non-polar  region of the membrane allows for the movement of small non-polar molecules across the membrane’s interior, while preventing the movement of polar molecules, thus maintaining the cell’s composition of solutes and other substances by limiting their movement.

Further explanation:

Lipids are composed of fatty acids which form the hydrophobic tail and glycerol which forms the hydrophilic head; glycerol is a 3-Carbon alcohol which is water soluble, while the fatty acid tail is a long chain hydrocarbon (hydrogens attached to a carbon backbone) with up to 36 carbons. Their polarity or arrangement can give these non-polar macromolecules hydrophilic and hydrophobic properties i.e. they are amphiphilic. Via diffusion, small water molecules can move across the phospholipid bilayer acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic and contain large concentrations of polar water molecules or other water-soluble compounds.

Similarly via osmosis, the water passes through the membrane due to the difference in osmotic pressure on either side of the phospholipid bilayer, this means that the water moves from regions of high osmotic pressure/concentration to regions of low pressure/ concentration to a steady state.

Transmembrane proteins are embedded within the membrane from the extracellular fluid to the cytoplasm, and are sometimes attached to glycoproteins (proteins attached to carbohydrates) which function as cell surface markers. Carrier proteins and channel proteins are the two major classes of membrane transport proteins; these allow large molecules called solutes (including essential biomolecules) to cross the membrane.

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

#LearnWithBrainly

5 0
3 years ago
enzymes affect the reaction in a living thing by changing the activation energy and ___________- up the reaction
Alja [10]
Speeding up the reaction
4 0
3 years ago
why would cactus plants be better able to survive than another type of plant if their environment became drier?​
just olya [345]

Answer:

Cactus plants are able to survive in drier environment because they are able to store water for long periods.

8 0
3 years ago
4. Living things are sometimes called "carbon-based life forms." Do you think this is a good way to describe life? Explain your
victus00 [196]

Answer:

Explanation:

Yes, for a couple of reasons.

1. Carbon connects easily with other carbons.

2. Carbon forms chemical that can change and connect with other carbons even in biology or especially in Biology. If you take a brown seen and plant it where it can get water and soil nutrients, to will come up as a green plant. Think about the chemistry that goes into that. Not only that, but there are mechanisms that tell the upper part of the plant that the roots can't supply any more growth. Isn't that something? All made from Carbon.

3. The human body is a mass of Carbon based chemicals and all cells there can have different functions. Amazing isn't it? I'm a fan of the diversity of our planet and its growth.

4 0
3 years ago
Other questions:
  • The human genome contains approximately 10 6 copies of an Alu sequence, one of the best-studied classes of short interspersed el
    15·1 answer
  • What is an infection of the urinary bladder called?
    13·1 answer
  • What are cytokines; what role do they play in cancer treatment? Give an example of one in your answer.
    13·1 answer
  • An example of a teacher teaching philosophy<br><br>​
    12·1 answer
  • Mark turned quickly, pivoting on his right foot, while he was playing basketball. He felt a sudden, sharp pain in his knee and f
    12·2 answers
  • A substance that influences the reaction but does not participate in the reaction is
    9·1 answer
  • 8. DNA is copied into mRNA during the process of ________________.
    14·1 answer
  • Which phylogenetic tree shows that lactation--the production of milk to feed young--is a homologous trait in humans, dogs, and b
    8·1 answer
  • Explain how the distance between genes relates to the frequency of recombination
    15·1 answer
  • Which two processes are responsible for the formation of fog?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!