Question

think about what you have read and discuss the following

• what prevents bacteria from covering the planet?
• what is the main disadvantage of asexual reproduction

Explanation:

First Question: What prevents bacteria from covering the planet?

Bacteria growth is limited by factors like resource availability (nutrients, space), competition (between bacteria species or with other organisms), predation (by protozoa, bacteriophages), environmental conditions (temperature, pH, moisture), and the immune system (in hosts for pathogenic bacteria). These factors restrict their uncontrolled proliferation.

Asexual reproduction produces offspring with identical genetic material to the parent. This lack of genetic variation means populations are less adaptable to environmental changes (e.g., new diseases, climate shifts) since there's little genetic diversity to drive evolution via natural selection.

Answer:

Bacteria are prevented from covering the planet by limited resources (nutrients, space), competition, predation, unfavorable environmental conditions, and host defenses (for pathogenic bacteria).

Second Question: What is the main disadvantage of asexual reproduction?