Plant root nodules are
A) formed from gall-rotting bacteria that decompose plant roots.
B) harmful to plants, because the bacteria outcompete the plants for nutrients.
C) sites where nitrogen fixation occurs.
D) structures created by fungi and are found in all agricultural crops.
Answer: C
You might also like to view...
Which of the following diseases is NOT normally spread by a common source?
A) measles B) foodborne diseases C) waterborne diseases D) cholera
The first law of thermodynamics states that energy can be transformed from one state to another, but it cannot be created or destroyed. Taking this into consideration, what can be said about the energy transferred between levels in a trophic pyramid?
A. Some of the energy in a trophic level is converted to heat and is unavailable to the next level. B. All the energy is transferred between trophic levels because components that have no energy, that is, light, are used to create the energy in the chemical bonds of carbohydrates. C. All the energy necessary for a trophic level is transferred. Because there is less biomass at each trophic level, less energy needs to be transferred. D. Some of the energy is held in one trophic level, and only the energy needed to support the smaller biomass at a higher level is transferred. E. Organisms at higher trophic levels only consume the energy they need from lower trophic levels, leaving a "bank" of energy to support the higher level when food is scarce.
Penicillin is a good example of a hapten.
Answer the following statement true (T) or false (F)
Hereditary information in all eukaryotes, prokaryotes, and viruses is stored in ____
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids