How have paleontologists contributed to humans' understanding of the history of life? check all that apply. ( )they created a record of life on earth. ( )they grouped organisms by their similarities. ( )they grouped organisms by the period in which they existed. ( )they discovered that the first humans lived with dinosaurs. ( )they discovered that life has existed since earth was created.

The answers are They made a record of life on Earth.  They gathered living beings by their likenesses.  They gathered living beings by the period in which they existed.  

Explanation:

Fossil science is something beyond dinosaurs! A scientist is a researcher who ponders the fossilized stays of a wide range of living beings plants, creatures, parasites, microbes and other single-celled living things, and is keen on knowing the historical backdrop of natural life on earth.Paleontologists are researchers who think about fossils, the remaining parts of old life forms. Finding and exhuming fossils is the most noticeable part of a scientist's work, yet the ID, research and sharing of discoveries are altogether similarly critical segments of the activity.

They created a record of life on Earth.

They grouped organisms by their similarities.

They grouped organisms by the period in which they existed.

yes by elenaboo   it could cause lots of stuff

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.