If a human egg recieves 2 copies of a chromosome and is fertilized, how many copies of the chromosme would there be in the resulting embryo

Despite the differences in mature plant cells, all of them are derived from meristem cells. the three major types of tissue systems develop from the meristem. meristems develop cells in all but which tissue?

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.

This is a biological reaction due to a stimulus. i need this quickly !