When two populations become isolated from each other for enough time that they can no longer interbreed, they are considered to be a. adapting to each other b. separate species c. same species but different genus d. developing into one species?

Aperson who uses a computer at a desk does not have to worry about safety in the workplace. true or false

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?