Linked genes
a. are found on homologous chromosomes.
b. never cross over during prophase
c. undergo crossing-over of sister chromatids at a high rate.
d. tend to be close together on a single chromosome.
e. always assort independently.

Option D.

Explanation:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

explanation:

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