Answer:
False
Explanation:
One of the proof of a good scientific experiment is the ability to reproduce the steps leading to the results obtained from the experiment.
To proof the validity of the claims of an experiment by other scientists:
- Every experiment must be reproduceable by other scientists.
- This will enable the experiment to be rid of any bias.
- For the conclusions of an experiment to be validated by other scientists, such experiment should be tested by others.
- If the results are the same, then the hypothesis can be advanced.
- If not, the experiment is redesigned or discarded.
Most scientists believe that for half of Earth's 4.6-billion-year history, the atmosphere<span>contained almost no </span>oxygen. Cyanobacteria or blue-green algae became the first microbes to produce oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.
this answer came from this website </span>The Rise of Oxygen - Astrobiology Magazine<span>www.astrobio.net/news-exclusive/the-rise-of-oxygen/
it should help</span>
Answer:
At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.
the first answer is ulna. the second answer is radius
Answer:
A
Explanation:
Carbohydrates is your body's main source of energy. They help to fuel your brain, your kidneys, your heart muscles, and your central nervous system.
