Why are many ecological phenomena difficult to study

True or false: 1. A Scientific theory is just an educated guess about why something occurs. 2. Taking many measurements and averaging the results may correct random errors in data. 3. A good experiment must have one factor that can be manipulated.

Do you guys check the answers? some of the answers are wrong and made me fail my test!

Using natural resources led economies into depression. True or false

Which number identifies the abyssal plain? A. 4 B. 5 C. 6 D. 7 E. 8 F. 9

The moon Is unique among the moons of the solar system, party because it A. Very small B. Is larger compared to its plant C. Lacks craters D. Reflects light from the sun

A healthy weight for an individual should not be based exclusively on weight, but on: select one: a. amount of lean body tissue. b. energy intake versus energy expenditure. c. body size of family members. d.

Do plant cells have mitochondria? yes or no

Antarctica is covered in ice. which of the following would you expect to be true of Antarctica? A. The ice is immune to insolation B. The ice has no heat capacity C. The ice has a high albedo D. The ice reflects no radiation

Mateo eats his breakfast and his gi tract will now begin the process of digesting and absorbing the nutrients from this meal. what is the order in which each of the organs of the gi tract will work to achieve this process?

Diffusion is the spontaneous movement of a substance from an area of what