Using an electron microscope, a scientist identified these cell structures in an unknown organism: mitochondrion, nucleus, cell wall, and chloroplast. What kind of organism did the scientist find?

Three different types of body cavities animals have

The male red-winged blackbird defends its territory and uses loud vocalizations to attract a mate. Such behavior directly benefits these birds because it results in (1) increased competition for food (2) greater reproductive success (3) reduced

If the pH of a solution is increased from pH 5 to pH 7, it means that the concentration of H + is twice (2X) what it was at pH 5. concentration of H + is one-half (1/2) what it was at pH 5.

Which sentence best describes the axis of rotation of Earth? A. The axis changes the direction of its tilt over time. B. The axis has a slight tilt. C. The axis tilts so that it is almost horizontal. D. The axis does not have a tilt

Which statement best describes the roles of snow and rain in the water cycle?

Explain how and why the thylakoids are able to make ATP in the dark.

Egg and sperm are a type of these?

Is coral a plant or an animal?

What prevents blood movement from left ventricle to left atrium

What happens in an aphotic zone of a body of water