Assume that a population of one of these finch species is undergoing evolution by natural selection with respect to beak size and shape what changes occur gradually overtime that indicate the population is evolving

Astudent conducts an experiment to determine how the amount of water given to a plant affects it growth what is the dependent variable for this experiment

The body is protected against harmful flu viruses by

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.