Chemicals produced by bacteria that limit the growth of other bacteria are called:

The optic nerve is located in which cavity? a. Cranial b. Nasal c. Orbital d. Buccal

What happens to new oceanic crust at a mid-ocean ridge A. it forms new mountains under the water B. it climbs up the mantle to form a trench C. it gets hotter and sinks into a trench D. it is so dense that gravity pulls it into a deep-ocean trench

A simple apparatus used to show the process of osmosis is an

How does speciation and extinction affect the biological diversity of an ecosystem

What makes a dwarf planet different from a planet

Which discovery is attributed to Phoebus Levene? A. extraction and observation of DNA B. identification of ribose and deoxyribose C. recognition of RNA as DNA's messenger D. construction of an accurate DNA model

A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. how will genetic drift probably affect this population?

Which type of cells can differentiate into many different types of cells? select all that apply

A person has such severe epilepsy that his limbs are paralyzed, and doctors recommend a radical hemispherectomy. what results can he expect?

What does the term carrying capacity refer to?