1.The fish gill has filaments containing blood vessels, capillaries are in the lamellae. Usually the blood flows through the capillaries in the OPPOSITE direction as water flow. According to the diagram, if the blood flow is in THE SAME direction as the water flow the maximum oxygenation of the blood […]

Q1. Hermann Kolbe’s synthesis of an organic compound, acetic acid, from inorganic substances that had been prepared straight from pure elements was an important milestone for what reason? Q2. The octopus eye is sometimes offered as an instance of a structure that is too complex to have evolved incrementally. What […]

A Type I survivorship curve is level at first, with a rapid increase in mortality in old age. This type of curve is a. typical of many invertebrates that produce large numbers of offspring  b. typical of humans and other large mammals c. is the point where the population growth […]

Q1. Archeologist discovers skeletal remains of humanlike animals in Ethiopia. Examination of bones suggests that the remains represent four types of individuals. Two of skeletons have bone densities 30 percent less than those of the other two skeletons. The skeletons with the lower bone mass also have broader front pelvic […]