Why might variation in guppy coloration have developed as a trait?

How does exercise affect the balance of salt and water in your body seventh grade science middle school

A student examines a sample of pond water under a microscope and observes a single-celled heterotrophic eukaryote swimming through the water. To which of the following Kingdoms does this organism most likely belong? Protista Fungi Plantae Bacteria

Which part of the central nervous system is used to used to serve as the main communication link between the body and the brain? A. Cerebellum B. Spinal cord C. Brain stem D. Cerebrum

Your lab instructor gives you a slide containing prepared muscle tissue. how would you identify the type of muscle tissue located on the slide

What are all of the different stages in a cell's life cycle?

Fossils on the continent may be similar to fossils on another continent. This observation supports which theory?

Jane filled one transparent bottle and one brown bottle of the same capacity with pond water. She kept the first bottle in sunlight and the second in dark. After one hour she calculated the amount of oxygen present in both the bottles.

The kingdom contains all autotrophic organisms.

Bacteria cell traits

Which of the following is NOT a terrestrial biome? a desert a chaparral an estuary a tundra