Which of the following describes how bacteria can receive or exchange genetic material? (A) In transformation, some bacteria pic
k up pieces of DNA from the environment. (B) In conjugation, two bacterial cells temporarily join and transfer genetic material between them. (C) In transduction, viruses infect bacteria, carrying gene from one cell and injecting them into another. (D) All responses apply
Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
