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
Anna35 [415]
3 years ago
6

Life expectancy at birth for the world rose from 24 years to 26 years between 1000 and 1820, but by 2003, life expectancy had ri

sen to
Biology
1 answer:
inessss [21]3 years ago
4 0

Answer:

77.5 years

Explanation:

Preliminary data indicates that life expectancy at birth in the United States had reached a record high in 2003.

You might be interested in
What was known before Franklin and Wilkins conducted their studies of DNA? Check all that apply. DNA is found in the nucleus of
sattari [20]
Hello,

I'd say  that the <span>DNA is found in the nucleus of a cell. 
and also </span>Cells contain protein molecules.These are 
True.These were know before <span>Franklin and Wilkins
 conducted their studies of DNA</span>

Hope this helps

-HotTwizzlers
7 0
4 years ago
Read 2 more answers
The lower esophageal sphincter surrounds the upper opening into the stomach. If this sphincter failed to properly constrict, the
seropon [69]

Answer:

Regurgitation of acidic stomach contents into the esophagus, commonly called "heartburn"

Explanation: Esophagus is the part of the alimentary canal,which is a tube that transports food and water substance from the mouth to the stomach. Esophagus has an upper Esophagus sphincter and and the lower Esophagus sphincter. The lower Esophagus sphincter contains muscles that connects the Esophagus and the stomach. When the lower Esophagus sphincter is closed it prevents the movement of Acids and contents in the stomach from traveling backwards from the stomach. When it fails to effectively constrict it causes what is called "HEARTBURN".

5 0
3 years ago
At the end of meiosis 1 how many cells are there
GarryVolchara [31]
Meiosis produces four genetically different haploid cells.

7 0
3 years ago
Which would least likely produce genetic variation sexual or a sexual reproduction​
kolbaska11 [484]

Sexual, this is because during sexual reproduction both DNA of the parents is mixed to create an offspring.

Asexual reproduction is almost like a copy of the parent, there is no external DNA going into the production of the offspring.

8 0
3 years ago
Describe the path of an electrical impulse as it moves through a neuron. you must use the words axon, axon terminal, dendrites,
ira [324]
<span>The path of movement of electrical impulse starts from the dendrites. Then it passes through cell body, axon, axon terminal and to the dendrites of another neuron through the synapse. Myelin sheath acts as insulator, Nodes of ranvier are small gaps in axons which facilitate the impulse transfer. This impulses are chemical messengers known as neurotransmitters.</span>
3 0
4 years ago
Other questions:
  • Mountains are part of which earth sphere
    15·2 answers
  • How do genes make evolution possible?
    6·1 answer
  • The normal upper end of the temperature reference range of a goat is 103.5 degrees fahrenheit. what would be the maximum body te
    14·2 answers
  • Which changes take place in the immune system of a person who is infected with hiv, and how might that infection develop into ai
    15·1 answer
  • Due tomorrow please help me
    7·1 answer
  • The tropic of cancer and the arctic circle are examples of locations determined by:
    13·1 answer
  • The first supersonic flight was 1947. It was just above the speed of sound. Which altitude would you expect captain Yeager to ha
    12·1 answer
  • Different between of troposphere and thermosphere​
    5·2 answers
  • 3. How many layers does our skin have? *<br> 3<br> 5<br> 7
    11·1 answer
  • To reproduce, female elephants produce eggs and male elephants produce sperm. Offspring are produced by the fusion of an egg wit
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!