The continuous, low-level extinction of species is referred to as mass extinction.
A widespread and quick decline in the diversity of life on Earth is known as an extinction event.
A sudden shift in the diversity and abundance of multicellular creatures serves as a telltale sign of such an occurrence. It happens when the rate of diversification outpaces the rate of extinction.
A mass extinction event occurs when a species disappears far more quickly than it is replaced.
This is typically understood as the loss of almost 75% of all species over a "short" period of geological time, or fewer than 2.8 million years.
The Cretaceous-Paleogene extinction, sometimes known as the day the dinosaurs died, is the most well-known of all the mass extinction events.
Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.
