The chief water conducting elements of xylem in gymnosperms are�

Subject

Biology

Class

NEET Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

1.

Which one of the following structures between two adjacent cells is an effective transport pathway?

  • Plasmodesmata

  • Plastoquinones

  • Endoplasmic reticulum

  • Endoplasmic reticulum

1407 Views

2.

Single -celled eukaryotes are included in 

  • Protista

  • Fungi 

  • Archaea

  • Archaea

597 Views

3.

In unilocular ovary with a single ovule, the placentation is 

  • marginal

  • basal

  • free central 

  • free central 

935 Views

4.

An element playing important role in nitrogen fixation is 

  • Molybdenum

  • copper

  • manganese

  • manganese

516 Views

Advertisement
5.

One example of animals having a single opening to the outside that serves both as mouth as well as anus is 

  • Octopus

  • Asterias

  • Ascidia

  • Ascidia

1105 Views

Advertisement

6.

The chief water conducting elements of xylem in gymnosperms are 

  • vessels

  • fibres

  • tansfusion tissue

  • tansfusion tissue


D.

tansfusion tissue

The tracheids are elongated, angular dead cells with hard lignified wide lumen and narrow end walls. The walls of tracheids posses different types of thickenings and the unthickened areas of its wall allow the rapid movement of water from one tracheid to another. Tracheids are the characteristic cells types of xylem tissue in gymnosperms and pteridophytes, where they are chief elements of water conduction.

643 Views

Advertisement
7.

which one of the following is not a micronutrient?

  • Molybdenum

  • Magnesium

  • Zinc

  • Zinc

475 Views

8.

Membrane -bound organelles are absent in 

  • Saccharomyces

  • Streptococcus

  • Chlamydomonas

  • Chlamydomonas

981 Views

Advertisement
9.

The kind of epithelium which forms the inner walls of blood vessels is 

  • cuboidal epithelium

  • columnar epithelium

  • ciliated columnar epithelium

  • ciliated columnar epithelium

442 Views

10.

Which one of the following has its own DNA?

  • Mitochondria

  • Dictyosome

  • Lysosome

  • Lysosome

1107 Views

Advertisement