Answer:
Darwin conducted an experiment with breeding pigeons.
Explanation:
The pigeons provided the perfect animal to test his theory of selection for quite a number of reasons including its trait diversity from wing structures to color patterns to size to flight patterns. From these experiments he concluded that by natural selection of randomly occurring traits that make species better suited for survival and reproduction, evolve in the astounding diversity of organisms on Earth today.
<em>(not my words) </em>
Those are called minerals
The era of Enlightenment was characterized by:
- Governments exist to serve the people.
- The social contract allows for consent of the governed.
- The divine right of kings to rule with absolute power is a violation of the social contract.
- Governments that break the social contract must be overthrown.
- All citizens are born with natural rights to life, liberty, and property.
- Use of reason can solve government problems.
<h3>What is an era?</h3>
An era is a time period which is characterized by a certain event or occurrence.
An era is defined by certain way of life or culture both written and spoken.
Some of the various eras of human existence are:
- Middle Ages
- Scientific Revolution
- Enlightenment
- Era of Good Feelings
In conclusion, the various eras of human existence have various characteristics.
Learn more about era at: brainly.com/question/24761999
#SPJ1
Answer:
A zygote can end up with one fewer chromosome than normal because one of the fertilizing gametes was missing a chromosome. This deletion, called nondisjunction, happened while the gamete was forming.
Explanation:
Answer:
grams
Explanation:
Given -
Half life of the silicon-32 
years
Half life means the time period required by a radioactive element to reduce its mass by half.
Radioactive decay formula is
Where
A represents the amount of radioactive element after time t years
represents the initial amount of radioactive element
time of decay
half-life of the substance
Substituting the given values in above equation, we get -
grams
