1.1.6 Watter een van die volgende is NIE ‘n fossiel nie?A.  ‘n Dinosourus skedel, 65 miljoen jaar oud.B.   Olie gevorm uit mikroörganismes; 150 miljoen jaar oud.C.  Klipgereedskap wat 2,6 miljoen jaar gelede deur menslike voorouers gemaak is.D.  Trilobiet oorblyfsels, 580 miljoen jaar oud. (2)

1.1.7 Die grafiek toon hoe die suurstofkonsentrasie en getalle bakterieë verander wanneer riool by ‘n rivier gevoeg word. KLIK OP DIE KNOPPIE OM DIE DIAGRAM OOP TE MAAK IN ‘N NUWE BLAD:   Wat beskryf die suurstofkonsentrasie en die getalle bakterieë tussen die punt waar riool bygevoeg word en punt P?A. Suurstofkonsentrasie en getalle bakterieë bly dieselfde.B. Suurstofkonsentrasie verminder en getalle bakterieë verhoog.C. Suurstofkonsentrasie verhoog en getalle bakterieë neem af.D. Suurstofkonsentrasie bly dieselfde en getalle bakterieë verhoog. (2)

2.2 Bestudeer die foto van die Archaeopertyx fossiel hieronder.   OM DIE FOSSIEL TE BESIGTIG, KLIK OP DIE KNOPPIE OM DIT OOP TE MAAK IN ‘N NUWE BLAD:    

A chemical reaction or physical change that absorbs heat.

An air bag filled with 77.8 g of nitrogen gas at 25°C has a volume of 66.8 L. What is the pressure in the bag in kPa?

In the text box below, answer the following about the cell below:   a. Is this cell in the process of mitosis or meiosis (1pt)? b. What phase of the process is the cell in (1pt)? c. Consider one of the dark blue figures in the cell. Does this represent a chromatid or a chromosome, and is the figure unreplicated or replicated (1pt)? d. What is the genetic content of the cell (n and ploidy, you may write as shorthand, 1pt)? e. At the end of the process, how many chromosomes will there be in each daughter cell (briefly explain your answer, 1pt)?            

A true-breeding tall, purple-flowered pea plant was crossed to a true-breeding short, white-flowered pea plant. The F1 generation consisted of all tall, purple-flowered plants. Using this information, answer the following in the text box below: Are there one or two characters being studied in this cross (list the character(s) and the traits associated, 1pt)? Assign letters for the alleles carried by the parental generation plants (be sure to indicate dominant and recessive and the phenotype associated with each letter, 1pt). Using the letters you assigned, give the genotypes of the parents and of the F1 generation. Then, give the gametes that will be formed from the F1 generation (1 pt). Explain: how are Mendel’s two laws demonstrated by this cross (2pts)?

The genetic content of a cell is 3n = 21. What is n equal to?

Continuing from the last question (pedigree is the same): The question mark on the pedigree below indicates a third child the couple is expecting. Calculate the probability that the child will be a girl and have the condition (hint: use the scratch paper and write out the likely genotypes of the parents to help).

Prokaryotes divide by __________________, which is a type of ______________ reproduction.