Combined. These characteristics provide humans with a large amount of fossil evidence for trilobites. Fossil Record of Trilobites in Texas
60m
Dega Blow the Earth's surface
70m
Which statement below best describes the cause of the arrangement of smooth and spikey trilobite fossils observed in the fossil record above?
The smooth trilobites were able to dig deeper into the soil than the spikey trilobites because they did not have protruding spikes that
would catch on rocks in the ocean floor.
Smooth trilobites could no longer blend in with the soil and grew spikes as an adaptation to protect themselves from predators
gradually over time.
The smooth trilobites were not able to compete with the spikey trilobites for food and slowly became extinct as the spikey trilobites
O
became more dominant in the environment.
O
A change in the environment caused the smooth trilobites to no longer be well adapted for the conditions. Spikey trilobites were well
adapted to the new environment and begin to thrive.

What process allows for the development of haploid sex cells? mitosis meiosis fertilization pollination

On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.

Why are common names a problem for scientist?