Om kennis te neem van hoe enkele voëlsoorte verskillend aangepas is
[lu 2.2]
Wat maak die voëls eiesoortig?
Dit is die enigste dier met vere as huidbedekking. Die vere hou die voël warm en droog. Dit help ook die voël om te vlieg.
Die voorste ledemate van voëls (hulle “arms”) het verander om vlerke te vorm.
Voëls het lugsakke in hul bene wat hulle lig maak sodat hulle kan vlieg.
Voëls se borsbeen vorm ‘n kiel waaraan hul sterk vliegspiere vasgeheg is.
Voëls het deursigtige vliese oor hul oë sodat hulle hul oë tydens vlieg kan oophou.
Hul oë is besonder goed ontwikkel. Dink maar aan arende en valke.
Voëls kan nie ruik nie en is dus vir voeding geheel en al van hul smaaksintuie afhanklik.
INTERESSANTE FEITE I.V.M. VOËLS
Die
volstruis is die grootste voëlsoort en lê die grootste eier.Volstruise word geteël vir hul eiers, vel, vere en vleis.Die volstruis skop sy vyand en kan ook seer pik.
Die Bloukransvoël: Nasionale voël van Suid-Afrika.
Die Kolgans: Die ou Egiptenare het hierdie voël as heilig beskou.
DIE POTE VAN VOËLS
In pare: Bestudeer die verskillende soorte pote en sê by watter voël hiernaas die pote pas. Motiveer waarom julle so besluit het deur na hul voedingswyse en leefwyse te verwys.
ABC
Jy kan gerus by die huis kyk na die snawels van voëls en hoe hulle by hul voedingswyse aangepas is.
Opdrag: groepwerk
Nie alle voëls bou neste nie.
Noem een soort voël wat nie ‘n nes bou nie.
Maak ‘n eenvoudige skets van die voël. Skets ook waar die eiers gelê word.
Die meeste voëls bou neste. Waarom?
Kies een soort voël wat jy in jou omgewing waarneem.
Identifiseer die soort voël.
Maak ‘n skets van die nes en voël.
Gewaar jy die mannetjie en wyfie? Verskil hulle in voorkoms? Hoe? Hoekom?
Hoe is voëls oor die algemeen aangepas om kos te kan soek en die kos te kan bekom?
Assessering
LU 2
KONSTRUKSIE VAN WETENSKAPKENNIS Die leerder ken, interpreteer en pas wetenskaplike, tegnologiese en omgewingskennis toe.
Dit is duidelik wanneer die leerder:
2.1 betekenisvolle inligting onthou;
2.2 inligting kategoriseer;
2.3 inligting interpreteer.
Memorandum
A - muisvoëls, pote slegs om aan takke te kan klou.
B - arend of valk (alle roofvoëls), sterk kloue om prooi te kan vang.
C - eend, soos alle voëls wat in water swem: swemvlak wat die oppervlak vergroot.
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 .
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product