Which best describes a virus?

The best know organisms of the Phylum Chrysophyta (Golden-Brown Algae) which contain walls of silica are the ___.

A codon is determined by:

In a diploid cell, chromosomes pair during meiosis.  Theses pairs are called ___ chromosomes.

Which of the following nucleotide bases is found only in RNA and not in DNA?

The red tide which occurs occasionally in the oceans producing toxins which kill fish and other aquatic life are caused by ___.

All living organisms contain these types of classes of primary molecules:

The haploid (n) number of chromosomes for humans is ___.

Phospholipids are similar to fats except they have ___.

Color blindness is an “X-linked disorder”.  A male who is color blind has children with a woman who is neither color blind nor a carrier. What are the changes their sons may be color bind?