How do peppered moths after the industrial revolution show the process of natural selection?
a. the black moths were more fit for survival, so their phenotype frequency increased. b. the black moths were more fit for survival, so their phenotype frequency decreased. c. the white moths were more fit for survival, so their phenotype frequency decreased. d. the white moths were more fit for survival, so their phenotype frequency increased.

In sexual reproducing animals once fertilization of the egg takes place, the exists as a single cell until cell division begins. a) egg b) larva c) sperm d) zygote

Asolution of an enzyme and a substrate was placed in a water bath and the temperature of the reaction was raised gradually. the graph shown was plotted at the end of the experiment. what can be concluded from the graph? a) temperature has no effect on the activity of the enzyme. b) the effect of temperature on the enzyme is unpredictable. c) the enzyme shows increased activity up to a certain temperature. d) the activity of the enzyme is inversely proportional to the temperature.

What molecule does hemoglobin decay into over time