Which of these sedimentary rocks is made of shells and the remains of marine organisms?

mudstone
rock gypsum
limestone
sandstone

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

What was the land like over 500 million years ago? what was under the sea?

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin