Which word(s) help the reader understand the meaning of stratum in Paragraph 3?
A."Insects"
B."Far less light"
C."This layer"
D."Home to"

What type of weather does tropical continental air bring in summer? hot and cloudy cool and sunny hot and sunny cool and cloudy

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.