Which statement is true about crossing over of genes? a. crossing over does not occur between genes that are far apart from each other on a chromosome. b. frequency of crossing over is related to the distance between linked genes. c. genes that are close to each other frequently cross over.

From which layer of atmosphere is the top layer of the thermosphere? a.troposphere b. stratosphere c.mesosphere d.exosphere hurry me i will give a braineilst

Why was mendel's work not accepted at the time? o a. his results were false. o b. he did not repeat his experiments. o c. he did not have any data. o d. his results were surprising,

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.