The La Brea Tar Pits in Los Angeles are the site of millions of fossils from the ice age. Woolly mammoths, giant sloths, dragonflies, and other plants and animals from
this era have been found in these pits.
Scientists at the tar pits discovered that many of the smaller animals they
extracted from the pits still exist around Los Angeles today. But many of the larger
mammals such as woolly mammoths and saber-toothed tigers-are now extinct.
Why do you think this is the case? What can scientists learn about Los Angeles'
climate history by studying the specimens found in these tar pits

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.

cells spend most of their time in interphase

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.