Which statement best describes why a pond ecosystem could be considered an open system?

All species of what? Have pharyngeal pouches at some stages during their development

What does the biodiversity on Earth indicate about its organisms? a) They share many common structures and functions. b) They are adapted to live in a variety of environments. c) They have not changed over the course of Earth's history.

Blood-brain barrier impedes the passage into the brain neurons of:

Chronic dehydration increases a man's risk of developing gallstones. true or false

How do human embryos change from early it's too late stages

According to Kepler's second law, which factor is constant as a line between a planet and the sun sweeps out two equal areas at different places as it moves along its orbit? A. The amount of time B. The distance the planet moves C.

The different conservation efforts being applied to protect rainforests.

How would you classify the relationship between the different species of coral?

Which of the following illustrates intraspecific competition? A sea gull swooping down to snatch a fish from the water's surface Male red-winged blackbirds defending limited nesting sites from other males A butterfly feeding on the nectar of a

What is one disease that follows the lytic cycle?