Which of the following best describes a macromolecule?

a) a simple molecule containing only carbon and oxygen
b) a large molecule made up of many molecular subunits and consists of a large number of atoms
c) the smallest basic unit of matter
d) a group of like atoms formed through ionic bonding

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.

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Eutrophication caused by human nutrient pollution.