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.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).