Which of the following statements about the evolution of development is false? a. evolution by natural selection "works" like a tinker, assembling new structures by combining and modifying available materials. b. nearly all evolutionary innovations are the result of modifications of previously existing mechanisms and structures. c. the genes that control development are highly conserved. d. all of the above are true; none is false

All of the above are true; none is false

Explanation:

Evolution is the phenomena by which an organism gets modified or develops more advanced characters which makes it more fit for the survival in nature.

The first statement is true because evolution refers to the modification of existing characters nothing new develops spontaneously  to overcome natural selection. During natural selection organisms that survive gradually surpass the selection pressure. And the evolved character of it gets fixed within the species.

Evolution occurs within the existing mechanisms and structure which find out new ways of surviving in the changing environment.

The genes that control the development are highly conserved and this is the reason we can trace back the similarities with common ancestors. And make a comparitive study of structural anatomy.

about 40,000,000 results (0.81 seconds)  

search results

what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.