just water usage? - I also wondered this but obtained the investigation
elsewhere so don’ t know. I thought perhaps the plant does not put onthat much mass compared to the mass of the water so it becomes insignificant
Dicotyledonous stem
Leaves develop from the nodes.
The sections of stem between the nodes are called internodes.
An axillary bud is often found at the node. These forms lateral branches.
A terminal bud is found at the tip of the stem and allows the stem to increase
in length.
Internal structure of the dicotyledonous stem
This diagram of a cross section shows the internal structure of a young dicot
stem
A waterproof cuticle is found on the outside of the epidermis to prevent water
loss.
The epidermis consists of a single layer of cells to protect the underlying
tissue.
The cortex is made up of parenchyma cells that stores water and food.
The vascular bundles are arranged in a ring in the medulla and are surrounded by
non-living sclerenchyma cells for strengthening and support.
Each vascular bundle contains the following:
Cambium (contains meristematic cells that divide to widen the stem)
Phloem (transports food from leaves to the roots)
Xylem (transports water from the roots to the stem)
This is a link to an online tutorial about phloem, xylem and pressure flow.
Movement of water up the stem
Water moves up the xylem from the roots to the leaves.
Adaptations of xylem for transporting water:
Long, elongated tubes joined end-to-end without any cross-walls, forming good
conducting tubes.
The cell walls are thickened with lignin for support (annual or spiral
thickening) so that they do not collapse due to the upward pull of water
Pitted vessels and tracheids allow for lateral movement of water into
neighbouring xylem vessels.
Cells are dead, so there is no obstruction to water transport
Diagram of xylem
Three forces are responsible for the movement of water up the xylem –
capillarity, root pressure and transpiration suction force.
Capillarity involves forces of cohesion (forces of attraction between water
molecules) and adhesion (forces of attraction between water molecules and thesides of the xylem vessels). Because the xylem’s lumen (opening) is so
tiny, water will move up by capillary. However, this force is weak and its rolein moving water up the stem is small.
Root pressure is a force that pushes water up the xylem. As water enters the
root by osmosis, it pushes the water that is already in the xylem of the stemupwards.
Transpiration suction force is a very important force that pulls water up the
xylem of the stem. As water evaporates from the stomata of the leaves duringtranspiration, it creates a sucking force that will pull the water up the
xylem.
Investigation: plant tissue anatomy (root and stem)
Aim: To examine the structure of the root and stem
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
When MP₁ becomes negative, TP start to decline.
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Economic growth as an increase in the production and consumption of goods and services within an economy.but
Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has
The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50.
A,Calculate quantities of x and y which maximize utility.
B,Calculate value of Lagrange multiplier.
C,Calculate quantities of X and Y consumed with a given price.
D,alculate optimum level of output .
