What determines similarities in anatomical features among organisms

The correct answer is -

Chromosome and genes.

Chromosomes are the thread like twisted structured composed of the genetic material (DNA, deoxyribonucleic acid).

They possess heredity units called  genes (segment of DNA, which determines particular trait of an organism). These units are passed from one generation to the next generation through chromosome.

Genes are transcribed and translated to form particular protein, which depicts anatomical feature of an organism.

Therefore, similarities in anatomical features/structure among different organisms is because of chromosomes and genes present in the organism.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: