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
Aneli [31]
3 years ago
7

The ________ is the amount of times a cell can replicate before dying, and in humans it is about ______. A. Hayflick limit, 1000

B. Hayflick limit, 50 C. Division constant, 1000 D. Division constant, 50
Biology
1 answer:
Vinil7 [7]3 years ago
4 0

Answer:

The answer is B. Hayflick limit, 50.

Explanation:

The Hayflick Limit is a concept that helps to explain the mechanisms behind cellular aging. The concept states that a normal human cell can only replicate and divide forty to sixty times before it cannot divide anymore, and will break down by programmed cell death or apoptosis.

Leonard Hayflick developed the concept while at the Wistar Institute in Philadelphia, Pennsylvania, in 1965. In his 1974 book Intrinsic Mutagenesis, Frank Macfarlane Burnet named the concept after Hayflick. The concept of the Hayflick Limit helped scientists study the effects of cellular aging on human populations from embryonic development to death, including the discovery of the effects of shortening repetitive sequences of DNA, called telomeres, on the ends of chromosomes.

You might be interested in
Which of these choices is the cytoskeleton's main structure? It provides support, structure, and
Greeley [361]
Answer: The answer is B
3 0
3 years ago
Can A Baby Otter Have Diabetes?
Bas_tet [7]

Answer:

Neonatal diabetes is often mistaken as type 1 diabetes, which is much more common. But type 1 diabetes usually occurs in children older than 6 months. Half of babies diagnosed with neonatal diabetes have a lifelong condition. This is called permanent neonatal diabetes mellitus. It occurs in 1 in 260,000 babies in some areas of the world.

Explanation:

4 0
3 years ago
What body system functions in secreting chemicals that act as relatively slow-acting messengers between body parts? select one:
Sloan [31]
B The Endocrine system would be the answer
4 0
3 years ago
Gregory is studying Lake Mairead. The lake has clear water and supports a healthy community of algae, fishes, and other aquatic
mihalych1998 [28]

Answer:

Through the process of Anthropogenic additions of N and P to the fresh water system can provide a strongest evidence for the above mentioned hypothesis.

Explanation:

As phosphorus is less mobile than nitrogen compounds, it is less likely to be found in fresh water where the organisms fail to access it. Phosphorus bounds mostly in the terrestrial ecosystem and in the aquatic matters because it has a sticky compound.

Thus it is a limited nutrient in freshwater lake like Mairead. However, this hypothesis can be different depending on other factors. Like, by adding anthropogenic N and P, this balance can be affected largely.

3 0
4 years ago
Steve Hill, a 51-year-old salesman, is at his health clinic for an annual physical exam. After walking from the car to the clini
Nataly_w [17]

Answer:

Stable angina

Explanation:

Stable angina is the most common type of angina and therefore, is called typical angina pectoris characterized by a burning heavy and squeezing feeling in the chest (substernal , shoulder ). It is caused by the reduction of coronary perfusion due to a fixed obstruction produced bt coronary atherosclerosis.

The heart becomes vulnerable to ischemia whenever there is increased demand, such as that produced by physical activity ,emotional excitement , or any other cause of increased cardiac workload.

Typical angina pectoris is promptly relieved by rest or nitroglycerin.

As in the above mentioned scenario, Steve hill feels substernal pain after walking from the car thus increasing work load on heart and this pain relieves with rest, this is a characteristic finding of stable angina.

4 0
4 years ago
Read 2 more answers
Other questions:
  • Membrane proteins of hamster cells were marked with a blue dye and membrane proteins of human cells were marked with a green dye
    13·1 answer
  • Which factor does not affect soil formation? type of rock time of exposure surface area animal intrusion
    14·1 answer
  • What limits where pikas live?
    5·1 answer
  • a model of the complex feeding interastiins among organism in a community from producer to decomposers called
    14·1 answer
  • What is the anion found in phosphoric acid?<br>A. PO3-<br>B. PO,3-<br>C. PO 3-<br>D. PO 3-<br>​
    15·2 answers
  • Blood typing is less expensive and quicker for analyzing blood evidence than DNA profiling. Since many different people share th
    12·1 answer
  • Honey Bee:<br><br>A.sexual reproduction.<br>B.asexual reproduction.<br>C.both.​
    11·2 answers
  • What are the two principle forms of ossification that occur in the development of the skeletal system
    5·1 answer
  • The bones from an animal found at an archaeological dig have a C614 activity of 0.10 Bq per gram of carbon. The half-life of C61
    8·1 answer
  • What is the organization of multicellular organisms?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!