How do mutations lead to variation?

A.

by giving organisms new features

B.

by providing a source of energy for

C.

by signaling proteins to be synthesi

D.

by producing changes in the genetic

A population of water snakes is found on an island in Lake Erie. Some of the snakes are banded and some are unbanded; banding is caused by an autosomal allele that is recessive to an allele for no bands.

Cabbages have 18 chromosomes. How many chromosomes do each of the daughter cell produced by mitosis have?

Which statement best describes the event shown in the diagram? tyrosine + valine + proline - > tyrosine - valine - proline a) Glucose is being sunthrsuized in the chlorplast using nitrogen from plants.

Which of the following statements concerning immunological memory is true? A. The memory response involves only B cells. B. The memory response is due to production of long-lived memory cells that can respond very rapidly upon second exposure. C.

Which statement best explains homeostasis

Suggest ONE reason why some plants have no dispersing seeds

Which of the following is a possible order of the scientific method

What system that removes waste from the body and controls the body's water levels?

How is a scientific law formed?

Approximately, when was the structure of DNA first described? 1900 1950 1800 1850