The sun is the ultimate source of

You repeatedly pair a tone with food until the dog salivates to the sound of the tone. You then present the tone several times without the food until the dog no longer salivates when he hears it.

Looking at a cell under a microscope, you note that it is prokaryote. How do you know?/ A) the cell lacks cytoplasm B) the cell lacks a cell membrane C) the cell lacks a nuceleus D) the cell lacks genetic material

Which statement about folic acid is false? Folic acid absorption is dependent on the enzyme folacin. Folic acid is stored in the liver. Folic acid is essential for RNA and DNA synthesis within erythrocytes.

When geese loose a mate to they find another?

A newly discovered tree species has a cone-like structures that are covered with exposed seeds. Which plant group does it most likely belong too?

In this example the marker DNA includes fragments that have 23,130, 9,416, 6,557, 4,361, 2,322, 2,027, and 564 base pairs. Approximately how many base pairs are in the DNA fragment indicated by the letter A?

Is evolution real? Religions say it isn't.

A population of Eastern Cottontail rabbits lives in a particular ecosystem. This population's major predator is the coyote and its major food source is vegetation.

1. Which number in a chemical formula tells you how many atoms of element you have? O A. Coefficient O B. Chemical symbol O c. Subscript O D. Capitals

Which statement best describes the cycling of carbon between the atmosphere and geosphere? A Precipitation and condensation increasing the groundwater supply B Glaciers melting due to an increase in global climate temperatures C Volcanic activity