After Darwin proposed his ideas about natural selection as a mechanism for evolution was generally considered a theory. Why do we now refer to it as a theory?

How do jellyfish reproduce?

What does the word Eclipse mean?

How do free-living flatworms, tapeworms, and flukes eat?

You smell a rose and smile at its lovely scent. What type of nerve is mostly likely responsible for sending a message about the rose's scent from your nose to your brain? A. Spinal motor B. Cranial motor C. Spinal sensory D. Cranial sensory

What effect do fertilizers have on rivers?

What relationship exists between trophic levels and a food chain

A niche is a part of an organisms habit

According to the data, the crickets at 25oC have greater oxygen consumption per gram of tissue than do the crickets at 10oC. This trend in oxygen consumption is the opposite of that in the mice.

A quiver tree grows in southern africa. which of the following plant adaptations is likely to prevent these trees from dying out due to rising desert temp

What kind of harm can bacteria cause?