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2.3.2 Using your knowledge of negative feedback, select which hormone will have to be in high concentration in a contraceptive pill (pill to prevent pregnancy) to stop the maturation of new ova? [1] (1)

1.2 Provide the correct biological term(s) for each of the following descriptions (1.2.1 – 1.2.10). Type the question number followed by the term(s). 1.2.1 The name of the reproductive strategy in which animals produce many offspring, but spend little time or energy on parental care. (1) 1.2.2 The type of reproduction in which the embryo develops in an egg outside the female’s body. (1) 1.2.3 The type of reproduction in which offspring are born alive after a period of gestation, during which the foetus is nourished and protected within the mother’s body. (1) 1.2.4 The structure inside an amniotic egg that serves as reserve food (proteins and water) for the developing embryo. (1) 1.2.5 A sac inside an amniotic egg that grows from the embryo’s intestines, to collect waste products and exchange gases. (1) 1.2.6 The name of the reproductive strategy in which animals produce few offspring, and spend lots of energy on parental care. (1) 1.2.7 The type of fertilisation used by most marine animals. (1) 1.2.8 Refers to species where the young are practically fully developed and immediately mobile when they are hatched or born. (1) 1.2.9 Chemicals secreted by some animals to attract and signal to the opposite sex that they are sexually mature. (1) 1.2.10 A structure that is laid on dry land, mostly by reptiles and birds, in which an embryo develops. (1)  

4.1.7 Bestudeer jou grafiek weer. Watter van die volgende waardes verteenwoordig waarskynlik die normale vlak van bloedglukose? (1)   [A] mg/dL  

2.2.2 Gee ‘n rede waarom die rotte in Groep 3 nie behandel was nie. (1)

2.3 The diagram below shows the interaction between “gland X” and the ovary during the menstrual cycle of a human female. Study the diagram and answer the questions that follow. CLICK ON THE BUTTON BELOW TO VIEW THE DIAGRAM:  

1.1.6 What phase of protein synthesis is shown in the diagram? A. DNA replicationB. TranslationC. Peptide bondingD. Transcription (2)

2.2.1 Formulate a possible hypothesis for this investigation. (2)

1.1.9 The table below shows certain mRNA codons and their resulting amino acids.  Study the table and answer question 1.1.9.  Table of mRNA codons and their resulting amino acids mRNA Amino acids mRNA Amino acids AAG Lysine CUU Leucine GAA Glutamic acid CAU Histidine AGU Serine GUA Valine UAU Tyrosine CCG Proline UUC Phenylalanine UGG Tryptophan   The original DNA triplet for Serine is: A.  TCAB.  AGUC.  UCAD.  TCT (2)

Hierdie is ‘n ekstra oplaai opsie. Jy mag dit SLEGS gebruik as ‘n vorige oplaai knoppie ontbreek het of nie behoorlik gefunksioneer het nie. As jy besluit om hierdie oplaai te gebruik, benoem jou lêer duidelik en volgens die ooreenstemmende vraag. Jy mag NIE enige geskrewe antwoorde hier oplaai nie.

2.3.3 Verduidelik jou antwoord by vraag 2.3.2. (2)