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
swat32
3 years ago
13

For a normal person, about how long does a cycle of sleep (from stage 1 to stage 4 and back again) last?

Biology
1 answer:
balandron [24]3 years ago
5 0
Hey You!

It lasts about 90 minutes for a normal person.
You might be interested in
Where does the energy of living things ultimately come from? And how? Explain the transformation
Reil [10]

Answer:

It all comes from the sun

Explanation:

this is because without the sun plants wouldn't grow and without plants our meat sources can't eat and therefore nothing else can either.

8 0
3 years ago
Where is the heart situated in the body and vertebrates ?​
Brums [2.3K]

Answer:

The Heart is situated in the Left side of the body

8 0
3 years ago
Read 2 more answers
Which term is defined as masses of rock,earth and/or debris that flow downhill.
marshall27 [118]
It would be a landslide.
3 0
3 years ago
Read 2 more answers
Lichens, like the one shown in the picture, are usually combinations of algae and A) fungi. B) mosses. C) orchids. Eliminate D)
san4es73 [151]
A. Fungi, the fungus surrounds the algae cells to act as a protective layer
6 0
3 years ago
Animals making the territory with e
Sholpan [36]

Answer:

Animals making the territory with example Lion, Tiger, hyena among others

Explanation:

Animals marks their territory through secretion of pheromones, some makes sound, it is a form of behavioral act that allows to protect ones territory or boundary

5 0
3 years ago
Other questions:
  • In the first series of reactions for the krebs cycle, what are the products from the original two pyruvate molecules? what is th
    11·1 answer
  • What is the runoff pollution, and what causes it?
    11·1 answer
  • Which of the following is not a body segment of the fruit fly embryo?ThoraxAbdomenHeadAntenna
    12·1 answer
  • Which is true of all animals, but not of all plants?
    10·2 answers
  • Is essential in the production of gametes for sexual reproduction because each parent needs to contribute _______ of their genet
    7·1 answer
  • What happens when two species occupy the exact same niche
    8·1 answer
  • Which rhinoceros species is best adapted for feeding in the large open grasslands of Africa's Serengeti ecosystem?
    12·2 answers
  • What sentence should be capitalized
    5·1 answer
  • Why does the body slow down during extreme heat that cause me it to work harder to maintain normal body conditions
    7·1 answer
  • 7 How are divergent boundaries between tectonic plates different from convergent boundaries? А Plates move north at divergent bo
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!