The characteristic feature that applies to all microorganisms is
a. they are multicellular
b. they perform photosynthesis
c. their cells have distinct nuclei
d. they are visible only with a microscope
Answer: d. they are visible only with a microscope
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Which of the following is NOT a mechanism used by bacteria to condense their DNA?
A. Super coiling B. Packaging the DNA with histone proteins C. Looping of the DNA D. Increase or decrease the number of turns in the DNA E. Anchoring the DNA loops with DNA-binding proteins
Which of the following best describes Mendel’s hybridizations?
a. the mating of two true-breeding individuals that have similar forms of the trait of interest b. the mating of two true-breeding individuals that have different forms of the trait of interest c. the mating of offspring back to one or both of their parents d. the mating of dominant-expressing organisms with homozygous recessive organisms
During times of stress, the autonomic nervous system causes the afferent and efferent arterioles to constrict, resulting in an increase in the amount of urine produced
Indicate whether the statement is true or false
A mother with blood type A has a child with blood type A. Give all possible blood types for the father of this child.
A. A, AB B. O C. B, AB D. A, B, O E. A, B, AB, O