Answer:
Companion cells
Explanation:
Companion cells are important structures found in the vascular bundle known as the phloem of plants. They work together with sieve cells in the movement of vital compounds such as Protein, ATP etc to other parts of the plant.
Companion cells are also known as living cells that do not conduct sugar themselves but they play a very important role in the movement of these substances.
They travel at the same speed.
Genetic divertion occurs with reproductive isolation
D
For a dominant allele to be present in the phenotype, it must be present on at least one of the homologous chromosomes in the genotype.