Answer:
A chemical reaction is a process that changes some chemical substances into others. It involves breaking and reforming chemical bonds. They follow the Law of Conservation of Matter.
Explanation:
200 different types of cells are in the human body
Pick a topic.
Research.
Hypothesis.
Experiment.
Construct an exhibit for results.
Write a report.
Practice presenting.
Pick something you are interested in, something you'd like to think about and know more about
Then do some background research on the topic.
Decide whether you can state a hypothesis related to the topic (that is, a cause and effect statement that you can test), and follow the strict method listed above, or whether you will just observe something.
Design and carry out your research, keeping careful records of everything you do or see and your results or observations.
Construct an exhibit or display to show and explain to others what you hoped to test.
Write a short report that also states the same things as the exhibit or display, and also gives the sources of your background research.
Practice describing your project and results, so you will be ready for visitors to your exhibit at the science fair.
Hope this Helps! May I Have Brainliest? <3
<u>Answer:</u>
<em>The biologists clarify these similarities as a homologous pair. This is based on the principle of convergent evolution.</em>
<u>Explanation:</u>
<em>Convergent evolution</em> is understood by the phenomenon of development of similar organs in different species in different period. Those<em> homologous pair </em>have same structure but can have different function in the different <em>species of organism. </em>
The bone of human arms, wings of the bat and dolphin flippers contain many of same bones which have developed from the same embryo tissue but the function for each is <em>different in different species.</em>
The attraction that holds two covalently bonded atoms together is called covalent bond