Which of the following forms an important component of. phloem tissue? a. tracheids b. vessels c. compainion cells i just need a straight answer no explination .

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Describe the two types of vascular tissue

If a cell loses control of gene expression what happens?