When bacteria fix nitrogen gas to produce ammonia

What is absolutely necessary for living organisms to survive?

Hypothesis: When the concentration outside the system is greater than the concentration inside the system, Where will solute move? and will water move?

coat color in mice involves the interaction of multiple genes if a mouse has two recessive alleles for coat colorit is always albino no matter what the genotype of oter genes involved in coat color this is an example of what

Identify all of the symptoms that may indicate an individual has acute lymphocytic leukemia.

Nucleotide degradation has no known associated disease states. results in production of a citric acid cycle intermediate for thymine. is the same pathway for all nucleotides. results in purine bases being converted to urea in humans.

as the flames heat the gasses in the hot air ballon, the volume of the gasses increases. At constant pressure, the volume of all gasses increase with temperature. Is this statement a scientific theory or law? Explain

What is a biological entity?

Toxic waste can enter foods through the contamination of groundwater. True or False?

An organism that is heterozygous for a particular character will generally show the recessive trait. a. true b. false

Some speciea undergo long peiods of stability interrupted by geologically brief periods of signifficant change. During these brief periods, new species may evolve. This pattern of evolution is part of the concept of