Three layers:
(uncalcified)-An outer proteinaceous periosteum,
(calcified)- a primatic layer,
(calcified)- and an inner pearly layer of nacre.
Answer:
Weak acid
Explanation:
There's a quizlet set for this lol
This process began in BRITAIN in the late 18th century and from there spread to other parts of the world.
Which information do tiny fossils found in drilling samples from Earth’s crust reveal about Earth’s history? select all that apply.
Microfossils - "are perhaps the most important group of all fossils — they are extremely useful in age-dating, correlation and paleoenvironmental reconstruction, all important in the oil, mining, engineering, and environmental industries, as well as in general geology."
Answers -
1. changes in climate
3. types of plants in the area
4. age of the organism when it died
