Question

root diversity in salt marsh and riverside habitats
genetic drift is one method of speciation influencing the diversity of mangrove roots. l. racemosa roots are similar between salt marsh and riverside habitats because of
a gene pool.
b gene flow.
c skinny genes.
d analogous genes.
root diversity in salt marsh and riverside habitats

Explanation:

Gene flow refers to the transfer of genetic material between populations. If the roots of L. racemosa are similar across salt marsh and riverside habitats, it is because genetic exchange (gene flow) between these populations keeps their gene pools mixed, preventing significant genetic divergence that would lead to different root traits. Genetic drift would cause divergence, while "skinny genes" is not a valid evolutionary term, and analogous genes refer to traits with similar functions from different evolutionary origins, which does not apply here.

Answer:

B. gene flow.