Tutor profile: Anthony H.

Name the four nucleotides of DNA.

Thymine, Cytosine, Adenine, and Guanine

What's the difference between phenotype and genotype?

The phenotype is the physical appearance of an organism, while the genotype is the genetic composition of an organism. Phenotype are observable and are the expression of the genes of an individual.

In each of the eight sentences below, there is a word missing. It's the same word in all eight places. Can you write the one word that makes sense of each sentence? ___ I hit him in the eye yesterday. I ___ hit him in the eye yesterday. I hit ___ him in the eye yesterday. I hit him ___ in the eye yesterday. I hit him in ___ the eye yesterday. I hit him in the ___ eye yesterday. I hit him in the eye ___ yesterday. I hit him in the eye yesterday ___.

The answer is 'only'. Only I hit him in the eye yesterday. I only hit him in the eye yesterday. I hit only him in the eye yesterday. I hit him only in the eye yesterday. I hit him in only the eye yesterday. I hit him in the only eye yesterday. I hit him in the eye only yesterday. I hit him in the eye yesterday only.