A HOX gene called Pax6 is required for developing light sensing eyes (or eye-like structures) in a range of Phyla including Cnidaria, Mollusca, Arthropoda, and Chordata. Humans (Chordata) and squid (Mollusca) have complex eyes with many shared features, like a lens, that are NOT found other Phyla that have eyes or eye-like structures. a. Are the human eye lens and the squid eye lens most likely homologous or analogous structures? Briefly explain your reasoning. (2 points) b. If you could examine the DNA of a "lens formation" gene in a squid and in a human, what evidence would support your reasoning? (2 points)

Listed in the item bank are some key terms and expressions associated with the categories seen in the venn diagram. to find out more information about items, some have more details available when you click on them. drag and drop each item onto the proper area of the diagram. if an item describes more than one category, be sure to place it in the overlapping space. viruses are tiny infectious pathogens that cause many different diseases, such as polio, and the flu. though they are similar to one celled organisms in some ways, in many ways they are very different. use the venn diagram below to show the similarities and differences between viruses and living organisms.

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. agouti x albino a) 1/2 albino, 1/2 agouti b) all agouti c) 3/4 agouti, 1/4 albino

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.