Their walls become thickened and woody. They therefore support the plant. Dissolved sugars and amino acids can be transported both up and down the stem. Companion cells, adjacent to the sieve ...

How does she know which plant has the TT genoptype ... in the offspring the unknown parent was heterozygous (Tt). Pedigree diagrams are used to show how a genetic condition is inherited in ...

The ISC Class 12 Biology exam is a crucial ... evolution, plant physiology, and biotechnology. Whether you are struggling with complex diagrams or tricky application-based questions, this list ...