Yes, cyanobacteria should be correct. They were the first organisms known to be alive.
You find the frequency of a wave by V/WL.
The distance between two adjacent crests of a transverse wave is called the wavelength.
Wavelength is a property of a wave that can be spotted and used as a way of telling waves apart. The parts of the wave that point up are termed crests while any part that is sloping called a trough.
Wavelength is measured in meters. There is no definite spot from which to start on a wave to measure wavelength. The most popular way of measuring wavelength is from crest to the next crest but can also be measured just as accurately from trough to trough.
I believe they are called endothermic.
Endotherms also called warm blooded animals are those that maintain a constant body temperature independent of the environment. They primarily includes, birds and animals, but some fish are also endothermic. On the other hand ectothermic animals or cold blooded animals are those whose regulation of body temperature depends on the external sources such as sunlight.
