An ecological numbers pyramid illustrates population sizes within an ecosystem. Based on the pyramid, which type of organism would be least abundant in most ecosystems?

Mass can be measured using a

Define homologous chromosomes

Kristen is running a half marathon. By her tenth minute of running, her breathing rate has increased from her resting rate. Which statement best describes how her tissues are responding to her running? A.

What are between Kingdoms and species?

DDT was harmful to birds because it prevented them from laying eggs. true or false

Which two characteristics of living things do viruses exhibit?

You are studying the source of new virus that has recently infected humans. You suspect that the virus was transferred from other primates (they exhibit a similar infection), specifically chimpanzees, gorillas, or orangutans.

According to the diagram liverworts are

What type of compounds always contain carbon and hydrogen

What is the junction between a nerve cell and another cell called: axon, synapse, dendrite, none of the above