0
yes, yes they do
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Describe a model for an external signal for growth?
Mike woodchooper
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.
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 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
What is a condition for a population showing exponential growth?
In order to have exponential growth there must be sufficient resources to thrive. The problem with exponential growth is that since the world is finite at some point there will be overpopulation.
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.
What are external regulators?
External regulators are molecules or signals from outside a cell that can influence its behavior. These regulators can control various cellular processes, such as growth, division, and differentiation, by interacting with specific receptors on the cell surface. Examples of external regulators include hormones, growth factors, and neurotransmitters.
What causes the abnormal growth rate of cancer cells?
Abnormal growth of cancer cells is caused by mutations in genes that regulate cell growth and division. These mutations allow the cancer cells to divide uncontrollably and evade normal growth regulatory mechanisms. Additionally, cancer cells can also evade signals that would typically trigger cell death.
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 could happen to target cells in an animal that lack receptors for logical regulators?
Without receptors for hormonal regulators, target cells would not be able to receive signals from these hormones. As a result, these cells may not respond appropriately to the body's regulatory mechanisms, which could lead to disrupted homeostasis and impaired physiological functions.
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 is the difference between internal and external growth for a firm?
Internal growth, or organic growth, refers to growth strategies where a firm uses its own resources. External growth involves a firm using or accessing the resources of another firm to grow. Examples of external growth strategies include joint ventures, strategic alliances and acquisitions.
What are the three local regulators what are their chemical composition and the function for each?
Nitric oxide(no)-secreted by neurons as a nerotransmitter growth factors these are peptides and proteins,stmulate growth of various tissues,prostagland modified fatty acids
What is the definition of developmental factors?
Developmental factors refer to the various influences, both internal and external, that contribute to an individual's growth and maturation over time. These factors can include biological, cognitive, emotional, social, and environmental elements that shape an individual's development from infancy to adulthood. Understanding these developmental factors is essential for promoting healthy growth and well-being in individuals across the lifespan.
What is the functiOns of gibberellins?
Growth Promoters with the plants Hormones (regulators)
What are the internal and external factors affecting business expansion?
internalproductionhuman resourcesmarketingavalible financeexternalcompeitiosstate of the market - growth/decline
