Pretty sure it’s D because when cold and warm air mix a tornado forms not sure tho
Answer: A. virus strains multiplied in cell cultures
Crossing over is a process that happens between homologous chromosomes in order to increase genetic diversity. During crossing over, part of one chromosome is exchanged with another. The result is a hybrid chromosome with a unique pattern of genetic material.
The stem of a plant grows_________from the pith. <u>outwards</u> or inwards
