Where does nitrogen come from in the ecosystem

Read the excerpt from "death by black hole." if you were made of rubber then you would just stretch in response. but humans are composed of other materials such as bones and muscles and organs.

how do i Predict the molecular formula of a three-carbon alkyne.

Which of the following is NOT true about bacteria? A. Bacteria can be autotrophic or heterotrophic. B. Bacteria are prokaryotes. C. Bacteria have a cell nucleus. D. Bacteria are unicellular

Which color of light does a plant like the most?

For lunch, Amanda had a turkey sandwich and a salad. Is she an herbivore, carnivore, or omnivore? Explain your answer.

What covers the ends of bones in adults? A blood B cartilage C marrow D ligaments

If gene expression control occurs during transcription, when did it occur?

If selfing starts in a previously randomly mating population composed of 0.50 heterozygotes, what is the frequency of heterozygotes after three generations of selfing

The movement of a bird away from a grass fire is caused by A) receptors initiating a stimulus B) impulse forming in a muscle tissue C) muscles responding to a stimulus D) effectors synthesizing neurotransmitters

What does a reflectd light look like