Why did viruses remain unseen for so long

Why is signaling in multicellular organisms more complicated than signaling in single-celled organisms?

The bald cypress tree produces seeds that are protected within cones. This tree is found in Florida swamps where heavy rains create floods. The floodwaters spread the cones throughout the swamps.

Harvey mixes two liquids. Which observation of the new mixture most likely indicates a precipitate is forming? a cloudy appearance a bubble formation a change in color a change in odor

What are the basic prefixes used in the metric system and how do they relate to the size of the base unit?

The hip and shoulder bones of a snake are an example of what structure

Which structure secretary's hormones directly into the bloodstream without using a duct A) lacrimal gland B) adrenal gland C) oil gland D) salivary gland

Disorder affecting one or more nerves where they exit the spine

What senses is associated with the temporal lobe?

What are 2 ways nitrogen becomes usable to plants, humans and animals?

What factor has the greatest effect on species diversity