They are rich in hydrogen and helium, they have unlimited supply of hydrogen, they have a strong gravitational pull.
Explanation:
Space where huge size of gaseous and dust cloud is present is called nebula. It is mainly made of hydrogen and helium. Nebula exist in the space which is between the stars and it is call as interstellar space.
Helix nebula is closest nebula which is near the earth. It’s distance from earth is about 700 light years.
Dark nebulae are very dense as well as cold. Nebula can be divided into dark nebula and bright nebula. The gas which is present between the stars is always combine with solid grains cosmic dust.
An acid has <em><u>c. more </u></em> hydrogen ions than a base.
Th correct answer is Phloem.
The conducting tissues in plants is called as the vascular tissues. It is made up of more than one type of cell type, that is found in vascular plants. The important components of vascular tissue are xylem and phloem. The function of these tissues are to transport fluid and nutrients inside the plant. Phloem is responsible for the transportation of sugar, protein and organic substances in plants. The vascular plants grow higher than other plants because of this transportation system.
- 19. Plant cell have plastids - chromoplasts, chloroplasts, leucoplasts.
- 20. Animal cell do not have a cell wall. Its outermost covering is the cell membrane.
- 21. Plant cell do not have centrosomes.
- 22. Animal cell has cholesterol in the cell membrane.
- 23. Either vacuoles are absent or present in small.
- 24. Plant cell has chloroplast.
- 25. Storage material is starch for plant cell.
Hope you could understand.
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