Process by which the blastocyst attaches to the uterine lining and begins to digest its way inward. _____

A) Human chorionic gonadotropin

B) Zygote

C) Chorion

D) Morula

E) Folic acid

F) Fertilization

G) Blastocyst

H) Parturition

I) Cleavage

J) Ovulation

K) Placenta

L) Implantation


Answer: L) Implantation

Biology & Microbiology

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__________ in annelids regulate the composition of body fluid. Fill in the blank(s) with the appropriate word(s)

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Prior to Mendel:

What will be an ideal response?

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Which of the following is a difference between primary and secondary succession?

A. Primary succession describes the evolution of plants, and secondary succession describes the evolution of animals. B. Primary succession is the start of evolution, and secondary succession occurs when there is a mass extinction. C. Primary succession only occurred once, when life first evolved on earth billions of years ago. D. Primary succession occurs after severe disturbances or on new land unoccupied by life, and secondary succession occurs after a less severe disturbance to an existing community. E. Primary succession is much more common than secondary succession.

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