Which conclusions can be inferred regarding the subduction of the oceanic plate

What are charcteristics of lithosphere?

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.