A (blank) mutation occurs when a base in the DNA sequence is replaced by a different base.

A chill is a sign that A) body temperature is falling. B) body temperature is rising. C) body temperature is not changing. D) the metabolic rate is decreasing. E) blood vessels are dilating.

Fruit flies have a diploid number of 8 and have a diploid number of 32. In which case will crossing over have greater impact on the genetic variation?

A flower is ready to become a fruit where would the instruction be found? A. Nucleus B. Plant ovum C. Mitochondria D. Ribosomes

Which description is consistent with chronic lymphocytic leukemia (cll) ?

A disease process that causes decreased ability of the lungs to perform their ventilatory function and can result from several other chronic disorders of the respiratory organs is called:

What is true about web based email? A. it can never be used in evidence B. it is downloaded to the hard drive of a computer C. it is sometimes a stored on the computer like other web pages D. none of the above

Crude oil is composed of: a. Fatty acids c. Metal oxides b. Hydrocarbons d. Halogens

What might introduction of exotic species disrupt an ecosystem

Will aluminum gain or lose electron and why?

What photosynthesis byproduct product is formed in the light reactions?