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What else can I help you with?
Do all vascular plants develop annual rings?
No, they don't.Vascular plants are those which have phloem and xylem structures within them to transport water and nutrients around the plant. Most of the plants you see around you are vascular. Think about grass or herbaceous plants - you won't find growth rings in those if you cut them through the middle, because they do not have cambium in their vascular bundles to initiate secondary growth. Most of the subtropical trees also do not develop annual growth rings although they have cambium because their apical growth never stops.Growth rings occur in plants having cambium and growing in a situation where there is disparity in the seasonal growth. During active growth period, as in spring season, more conduction of raw materials takes place hence the trachieds are broader and during autumn season when the plant prepares for winter, there is lesser conductivity through the xylem elements which makes their trachieds smaller. Thus the rings are caused by differential seasonal growth of xylem elements.----------------------------------In addition, since the tropical climates don't have the large changes in temperature and light hours that the temperate zones have, the vascular, woody plants don't have annual rings. They may form "growth" rings though. If they have a severe dry spell or severe hot or cool spell, or a grass fire, etc., then the tree may develop a pause in active growth and thereby form a "growth" ring. A tree in the tropics could form one growth ring in five years. Then again, it could form five growth rings in one year (that would be a rough year)The term growth ring is a better, more inclusive term than annual ring.Phloem
Why meristematic tissues are free from virus infections?
Meristematic tissues have a high rate of cell division and active metabolism, making it difficult for viruses to establish an infection. Additionally, meristematic tissues lack the specific receptors required for virus entry. The rapid turnover of cells in meristems can also help to restrict virus spread within the plant.
What does mitotically active mean?
Mitotically active refers to cells that are currently undergoing mitosis, the process of cell division. These cells are actively dividing and replicating their DNA to produce new cells. This term is often used in the context of assessing the growth and proliferation of tissues or tumors.
Where is the highest percentage of active mitosis in your body?
The highest percentage of active mitosis in the body typically occurs in regions where there is a rapid turnover of cells, such as the bone marrow, skin, and the lining of the digestive tract. These areas require constant cell division to replenish and repair tissues.
What would not occur if the parasympathetic division was more active than the sympathetic division?
If the parasympathetic division was more active than the sympathetic division, the body would experience a decrease in heart rate, pupil dilation, and the release of stress hormones. Overall, the individual would be in a more relaxed state with lower blood pressure and slower breathing.
How does the bark of a tree get food material to survive?
Bark is inactive in a tree but is constantly replaced by the active growth of the vascular cambium- which is just below the bark. Bark is basically a tree's skin on its branches and trunk.Just like damage to skin however, damage to bark (by mowers, scratching, pests, disease) can be very bad for the tree as damage to the vascular cambium could happen.
What does the cambium do for the plant?
The cambium is a layer of actively dividing cells in a plant's stem and roots that is responsible for secondary growth, leading to the thickening of the plant. It produces new xylem and phloem cells, which conduct water, nutrients, and sugars throughout the plant.
What region that produces cells in a plant?
If you're talking about where in the plant are the stem cells then it is the cambium, found around vascular areas near the xylem and phloem. However if you're on about where in the plant are areas of growth, it is the meristem tissue found at the root apex and shhot apex.
What are vascular tissues on a plant?
There are 2 types of vascular tissue in plants: xylem & phloem. Xylem is a structurally & functionally complex tissue concerned primarily with water conduction, storage & support. Phloem tissue is also both structurally & functionally complex. Phloem is concerned with the distribution of primarily organic molecules between "sources", that is, photosynthetic or storage tissues, and "sinks", or regions of active growth & metabolism.
What is the first active step in cell division?
Prophase is the first active step in cell division.
The gas that is more concentrated in the blood than in metabolically active tissues?
Oxygen is the gas that is more concentrated in the blood than in metabolically active tissues. Oxygen is transported by red blood cells and carried throughout the body to be utilized by tissues for cellular respiration.
How does bohr shift help deliver O2 to very active tissues?
Chuck Testa.
When the blood travels from the heart to all body tissues except the lungs it is?
active transport
Active in movement of the chromosomes during cell division?
cell membrain
What is the deepest and the most active division of skin?
The subcutaneous tissue (fat)
Some performers that have the word joy in the title?
Joy Division (not active)
What is a centriole with raditating firbers active during cell division?
Chromatid. :)
