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Multiply and give the answer in simplest form.  

The tRNA nucleotide sequence that pairs with bases on the mRNA is called a(n)

Julia preheated her oven for 18 minutes. What fraction of an hour was this?  

Let P = purple flowers and p = white, and T = tall plants and t = dwarf. Of the 16 possible gamete combinations in the dihybrid cross between 2 double heterozygotes, how many would produce the phenotype white, tall?

_______________________ epithelium provides a moist and slippery surface and is well suited to resist stree, as in the ____________________.

The hypodermis usually has an abundance of this tissue.

Write the number in standard form.

Crick and his colleagues proposed that the genetic code consists of a series of blocks of information, called ________, each corresponding to one amino acid in an encoded protein.

These cells stand guard against toxins, microbes and other pathogens.

In 1910, Morgan did a series of experiments with the fruit fly Drosophila, an organism where females are XX and males are XY. When a mutant male fly with white eyes was crossed with a wild type female with red eyes, none of the F1 progeny had white eyes but 18% of the F2 progeny had white eyes. Unexpectedly, all of these white-eyed F2 flies were males. Based on these results, Morgan concluded that white eyes is caused by a recessive X-linked allele. Suppose Morgan had found that half of the F1 progeny had white eyes but all of these white-eyed F1 flies were females. In this case, a valid hypothesis would be