Biology questions
20584 published questions with worked solutions.
- In woody trees, the exchange of gases between the outer atmosphere and the internal tissue of the stem takes place through
- Old dicot roots differ from old dicot stem in
- Meristematic cells contain more of
- Which of the following have sunken stomata?
- Consider the following statements. I. In a dicot root, the vascular bundles are collateral and exarch. II. The innermost layer of...
- Desert grasses often roll their leaves due to presence of
- Conjoint collateral closed vascular bundle is found in
- The large empty and colourless cells present at intervals on the upper surface of grass leaf are called
- Palisade parenchyma is absent in leaves of
- Bulliform cells found in
- The position of protoxylem in leaf is
- Root cap is not used in water absorption due to
- Two cross-sections of stem and root appear simple, when viewed by naked eye. But under microscope, they can be differentiated by
- The internal structure of a plant stem is observed. There is a discontinuous ring of angular collenchyma below the epidermis....
- Mesophyll is well differentiated into palisade and spongy tissue in
- Identify the plant parts whose transverse section shows a clear and prominent pith.
- In a woody dicotyledonous tree, which of the following parts will mainly consist of primary tissues?
- Exarch and polyarch xylem strands are found in
- The inner, darker and harder portion of secondary xylem that cannot conduct water, in an older dicot stem, is called
- In dicot stem, vascular bundles are