Which term best describes the following scenario? Calcium ions travel through the cell membrane into the cell, using an integral protein. There is a higher concentration of calcium in the cell.

What are two reasons for why a species might disappear from the fossil record?

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic. b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. c. all bacterial enzymes are harmful to humans and the environment. d. microbes create pollutants and toxins that harm the environment.

Which of these reproductive method is the only on available to mosses and fernsspores