What is the sudden appearance of a large array of animal life known as?

What is the main difference between qualitative and quantitative observations?

A chromosome-transmitted form of intellectual disability caused by the presence of an extra copy of chromosome 21 is called what?

Assuming that it will rain when the sky is cloudy and dark is an example of

In a well-balanced ecosystem, squirrels eat nuts, raccoons feed on squirrels, and bears feed on raccoons. It was observed that there were more squirrels and fewer raccoons. This situation indicates that.

Which best describes the process that the pest population has experienced due to this environmental change? genetic diversity natural selection natural resistance genetic resistance

In which of the following materials is the velocity of light greatest?

Which mineral is never found freely in nature but is extracted from a chemical compound? A. Coal B. Salt C. Gold D. Silicon

A scientist is studying the various prokaryotic and eukaryotic species found floating in a sample of water taken from a marine ecosystem. Which cellular component will be found in the widest range of organisms in the sample? a.

The process where the cell makes a copy of all its genetic material is called

The survival of some plants depends on their ability to have seeds transported to a favorable environment. Describe three different ways seeds can be transported from one location to another?