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What else can I help you with?
Describe a model for an external signal for growth?
Mike woodchooper
What is the purpose of washing the seeds in Step 3 of the experiment?
Washing the seeds in Step 3 of the experiment serves to remove any surface contaminants, such as dirt, pathogens, or chemicals, that could affect seed germination or plant growth. This step ensures that the seeds start with a clean slate, allowing for more accurate results in assessing their viability and growth potential. Additionally, it helps to prevent any external factors from influencing the experiment's outcome.
Do all cells grow and divide at the same time?
Most cells do not continuously divide. These cells enter the G0 phase of the cell cycle after dividing and do not begin diving again until stimulated to do so. Growth factors, nutrients, etc. are required to make these start dividing again. When these cells are needed, the appropriate growth factors will be introduced, and then they will begin dividing again. Some cells do continuously divide, such as epithelial (skin) cells. The cells that keep on dividing, even though they are not supposed to, are cancer cells. They eat up all your nutrients and form tumors etc.
What are the factors that can result in variable gram reaction?
Genetics, Age of culture, type of growth medium, and technique used could result in a gram-variable reaction
How does temperature affect the growth and yield of crops?
When annual temperatures increase sharply above the ideal crop temperature, it can cause a decrease in a crop's yield. Likewise, other factors like an increase in carbon dioxide levels can cause an increase in the growth of crops.
What are external regulators?
External regulators are proteins that respond to events outside the cell. These proteins direct cells to speed up or slow down the cell cycle, like traffic lights. For example, growth factors are one of the most important external regulators, and they stimulate the growth and division of cells. These differ from internal regulators in the fact that they respond to events inside the cell. Internal regulators allow the cell to proceed only when certain processes have happened inside the cell. Hope this helps! : )
Are growth factors local regulators that are produced by the anterior pituitary?
No. Growth factors are local regulators that bind to cell-surface receptors and stimulate growth and development of target cells.
Do external regulators prevent excessive cell growth and keep the tissues of the body from disrupting each other?
Yes, external regulators control cell growth and division by inhibiting excessive growth to maintain tissue homeostasis. By regulating factors such as growth factors and hormones, they ensure that cells grow and divide only when necessary to prevent disruptions in the body's tissues.
What are internal and external regulators?
Internal regulators are mechanisms within an organism that control their biological processes, such as hormones that maintain homeostasis. External regulators are environmental factors outside the organism that influence its biological responses, like temperature or availability of nutrients. Both internal and external regulators play key roles in determining an organism's growth and development.
How do external regulators respond to events outside the cell?
External regulators respond to events outside the cell by receiving signals from the external environment through receptors on the cell surface. These signals can activate intracellular signaling pathways that regulate gene expression, cell growth, division, or death in response to the external stimulus. This allows cells to adapt and respond to changes in their environment to maintain homeostasis.
What are internal cell regulators?
Internal cell regulators are proteins that respond to changes within a cell.For example, a normal cell will not enter the mitosis stage of cell division till the entire DNA is replicated. This check is regulated by a protein within the cell. This protein is the internal cell regulator.
What is the internal regulatory proteins effect?
mitoconderia
What are kinetins?
Kinetins are cell division factors which are found in various plant parts and in yeast. They are used as plant growth regulators.
What are some examples of internal and external signals that activate cell division?
Internal signals that activate cell division include growth factors and hormones such as insulin, while external signals include physical factors like cell-to-cell contact inhibition and chemical signals from neighboring cells indicating tissue repair or growth factors released by damaged tissue.
What has the author John W Mitchell written?
John W. Mitchell has written: 'Methods of studying plant hormones and growth-regulating substances' -- subject(s): Botanical Technique, Botany, Growth substances for plants, Plant hormones, Plant regulators, Technique, Technique, Botanical 'Test methods with plant-regulating chemicals' -- subject(s): Growth (Plants), Growth regulators, Plant hormones, Plant growth promoting substances, Plant growth inhibiting substances, Research 'Plant-growth regulators' -- subject(s): Growth regulators, Agricultural chemicals, Plant regulators
What are two examples of external factors that influence the cell cycle?
External factors that influence the cell cycle include growth factors, which promote cell division and proliferation, and environmental stressors, such as UV radiation or toxins, which can induce cell cycle arrest or apoptosis.
What is the functiOns of gibberellins?
Growth Promoters with the plants Hormones (regulators)
