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wel
3 years ago
10

Give an example of a scientific investigation that would require both observations and experiments

Biology
1 answer:
mestny [16]3 years ago
8 0
Put nectar into different colored containers but same size. put it outside and see how much nectar is left in each container is left

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For every action force there is an equal but opposite reaction force
aalyn [17]
That would be Newton's third law of motion.
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2 years ago
What is similar in size and shape to bacteria
bearhunter [10]

Answer:

Archaea

Explanation:

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3 years ago
Define embryonic stem cells. Explain the pros and cons of Embryonic Stem Cells
just olya [345]

Answer:

Embryonic stem cells are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo. Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells.

Explanation:

 

 Adult Stem Cells  

Embryonic Stem Cells      

Induced Pluripotent Stem Cells      

Pros

Trans differentiate and and reprogramming of these cells is possible but is not well studied

Thought to be less likely to be rejected if used in transplants

Success has already been demonstrated in various clinical applications  

Can maintain and grow for 1 year or more in culture

Established protocols for maintenance in culture

ESCs are pluripotent cells that can generate most cell types

By studying ESCs, more can be learned about the process of development

 

Abundant somatic cells of donor can be used

Issues of histocompatibility with donor/recipient transplants can be avoided

Very useful for drug development and developmental studies

Information learned from the “reprogramming” process may be transferable for in vivo therapies to reprogram damaged or diseased cells/tissues  

Cons

Limitations on ASC ability to differentiate are still uncertain; currently thought to be multi or unipotent.

Cannot be grown for long periods of time in culture

Usually a very small number in each tissue making them difficult to find and purify

Currently there is no technology available to generate large quantities of stem cells in culture

 

Process to generate ESC lines is inefficient

Unsure whether they would be rejected if used in transplants.

Therapies using ESC avenues are largely new and much more research and testing is needed

If used directly from the ESC undifferentiated culture prep for tissue transplants, they can cause tumors (teratomas) or cancer development    

Methods for ensured reproducibility and maintenance, as differentiated tissues are not certain.

Viruses are currently used to introduce embryonic genes and has been shown to cause cancers in mouse studies    

7 0
2 years ago
The difference between theory and law
Blababa [14]

In science, a theory is a hypothesis, and a law is a statement of a observed phenomenon proven to be true.

  • A theory explains why a natural phenomenon occurs.
  • Scientific laws summarize a set of observations about a natural phenomenon that was witnessed.
  • Both can be revised, used to make predictions, and are based off of a hypothesis.
6 0
3 years ago
Based on the information given in the chart, which kingdom most likely has the highest percentage of photosynthesizing organisms
Naya [18.7K]

Answer:

The answer is C. in other form Kingdom Plantae its C

8 0
3 years ago
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