If soil is 1000 years old is it young soil

4. In living cells, nucleotides and their derivatives can serve as: a. Carriers of metabolic energy. b. Enzyme cofactors. c. Intracellular signals. d. Precursors for nucleic acid synthesis. e. All of the above.

Do molecules have more energy in a solid, liquid, or gas?

Which of the following statements is NOT used to describe the biological classification system developed by Carl Linnaeus A. It uses two-word system based on descriptions of the animal B. It uses Latin based binomial nomenclature C.

By which process does water vapor become a cloud? A) evaporation B) transpiration C) condensation D) precipitation

Which is true of the material thatmakes up high resistance wires? A. Wires made of conductors have a higher resistance. B. Wires made of insulators have lower resistance. C. Wires made of insulators have a higher resistance.

Which organism's are omnivores? A) The snake, the bear, and the fish B) The fish and the eagle C) The bear and the fish D) The snake and the mouse If an omnivore is an animal that eats both plants and animals, I'd choose D because all the other

How are all humans similar?

Why does earth have such a diversity of plant and animal life? give three reasons.

After sequencing a molecule of dna, you discover that 20% of the bases are cytosine. what percentage of the bases would you expect to be thymine? explain why.

Kidneys that can conserve water are essential to homeostasis because: a) some animals live in dry or salty environments. b) some animals drink water.