What is the role of the spindle fibers during mitosis?

A) They help separate the chromosomes.
B) They break down the nuclear membrane.
C) They duplicate the DNA.
D) They make the chromosomes visible.


Ans: A) They help separate the chromosomes.

Biology & Microbiology

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Hepatitis A and C contain an RNA genome, whereas hepatitis B contains a DNA genome. What is the most plausible conclusion you could draw about these strains of hepatitis?

A. They do not all share a common ancestor. B. They all have the same rate of occurrence. C. They all have the same symptoms. D. They do not all affect the liver. E. They all have the same mode of transmission.

Biology & Microbiology

The immune complexes that are not removed by macrophages are:

A. intermediate sized B. very small C. large D. all of the above

Biology & Microbiology

The human genome consists of about ________ chemical letters

A) 300,000 B) 1 million C) 3 billion D) 300 billion

Biology & Microbiology

Organisms that must rely on complex, high-energy molecules produced by other organisms for survival are

A) heterotrophs. B) producers. C) autotrophs. D) cyanobacteria. E) denitrifying bacteria.

Biology & Microbiology