Biology Answers

Discuss the dissociation curve and how and why local conditions influence this curve.

Osmosis,10% solution of sodium chloride is on the first side of the semi-permeable membrane separating the vessel and 2% of sodium chloride is on its other side,describe the process taking place there.

A boy with colour blindness, has a mother with normal colour vision and a father with colour blindness. Did the boy inherit the gene for colour blindness from his mother or his father? Explain your answer to question 2a by using a Punnett square to identify the source of the colour blindness gene that was passed on to this boy.

Explain this type of heredity.

Dolphins and fish have similar body shapes. Is this feature more likely a homologous or analogous trait?

Explain your answer.

a. Analogous-Dolphins are mammals and fish are not, thus their evolutionary paths are quite separate. They have similar body shapes because of their similar environment.

b. Analogous-Dolphins and fish are both vertebrates, thus they share an evolutionary history, causing them to have similar body shapes.

c. Homologous-Dolphins and fish are both vertebrates, thus they have a similar recent evolutionary history, causing them to have similar body shapes.

d. Homologous-Dolphins are mammals and fish are not, thus their evolutionary paths are quite separate. They have similar body shapes because of their similar environment.