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
butalik [34]
2 years ago
8

1) What do u meant by photophone ?

Biology
2 answers:
Viefleur [7K]2 years ago
7 0

Answer:

June 3, 1880. You may know that a telephone uses electricity to send voice communications. However, you may not know that the man who invented the telephone, Alexander Graham Bell (1847-1922) had another invention that used light to transmit sound. He called it the photophone.

Explanation:

Debora [2.8K]2 years ago
3 0

jab Nye miljate hai tab purane boj lagne lagte hai !

You might be interested in
What happens when ATP is converted to ADP
Kaylis [27]

The electrons in these bonds carry energy. Within the power plants of the cell (mitochondria), energy is used to add one molecule of inorganic phosphate (P) to a molecule of adenosine diphosphate (ADP). The amount of energy stored is about 7,300 calories for every mole of ATP formed.


6 0
3 years ago
Why is it important for the cell membrane to allow materials to enter and leave the cell
umka21 [38]
<span>Cell membrane needs to allow and exit the materials that enter the cell because the cell needs nutrients and these nutrients are converted into molecules that aid in many cellular activities like repair, divide and form structures and biomolecules.
Also to excrete wastes and other harmful materials for the cell.
This continues because the cell wants to attain homeostasis.

Homeostasis is the state where the internal and external part of the body maintains and establishes balance and equilibrium. This is achieved through cellular processes in the body, the integumentary system regulates the body temperature, the hypothalamus –hunger and thirst of the individual and other interrelated organ systems that make the body healthy and in the state of equilibrium. Now, when diseases or disorders appear they disrupt the organ systems in the body thus, causing imbalance state –high fever, inability to focus and etc.<span>
</span></span>
5 0
3 years ago
Based on cell structure, all life forms can be placed into two categories called
djyliett [7]
Prokaryotic - cells that don’t contain a nucleus, for example bacteria cells

Eukaryotic - cells that contain a nucleus, for example plant and animal cells
5 0
2 years ago
Which of these is most likely to cause sea levels to rise?
Rzqust [24]

Answer:

?????

Explanation:

8 0
3 years ago
Read 2 more answers
There is presense air sac in stem of free floating plant why?​
Vanyuwa [196]

Answer:

Since they need to float, leaves on the surface of plants are flat. 6. The presence of air sacs enables them to float. Their roots are smaller so water can spread freely and directly into the leaves

5 0
2 years ago
Other questions:
  • This planet is an extremely light colored blue, and is the 7th planet from the Sun.
    8·1 answer
  • How does momentum and impulse affect roller coasters?
    9·1 answer
  • Lucia wants to arrange the four states of matter from lowest kinetic energy to highest kinetic energy. How should she arrange th
    7·1 answer
  • Reproductive isolation caused by a river is an example of
    9·1 answer
  • The replica fossil you just created models the actual formation of fossils on Earth. In your replica, what do the clay and the p
    7·1 answer
  • In the water process what do clouds form as a result of?
    14·1 answer
  • Which organism described below makes its own food?
    10·1 answer
  • Plss help
    11·2 answers
  • In your own words, what does “degradation” mean?
    12·2 answers
  • Discuss how temperature and amount of precipitation can affect the type of plants and animals found in the deciduous biome.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!