Zadanie 7, Paper 2, maj 2026, TZ3, Biologia IB SL
Wzorowane na: Biology SL Paper 2, May 2026, TZ3, pytanie 7. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Zadanie
Polecenie
Cell organization enables specialized reactions, and life cycles transmit inherited information.
(a) Outline three structural differences between eukaryotic and prokaryotic cells.
(b) Outline advantages of dividing a cell into compartments.
(c) Explain sexual reproduction in flowering plants and mechanisms that promote cross-pollination.
Korepetytor AI
Nie wiesz, jak ruszyć? Korepetytor zna to zadanie i poprowadzi Cię krok po kroku, bez gotowca.
3 rozmowy · bez karty · Zaloguj się
Sprawdź się
Odpowiedz i oceń, jak poszło. Klucz odsłoń dopiero, gdy masz swoją odpowiedź.
Jak poszło Ci z tym zadaniem?
Wybierz ocenę: zapamięta ją ta przeglądarka, a z darmowym kontem zobaczysz ją na każdym urządzeniu.
Pokaż rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(a) Eukaryotic DNA lies within a membrane-bounded nucleus; prokaryotic DNA does not. ✔
Eukaryotes have membrane-bounded organelles, whereas prokaryotes lack them. ✔
Plant/fungal walls can contain cellulose/chitin, whereas bacterial walls typically contain peptidoglycan rather than those materials. ✔
Typical eukaryotic cytoplasmic ribosomes are 80S and prokaryotic ones are 70S. ✔
Typical eukaryotic nuclear chromosomes are linear, whereas typical bacterial chromosomes are circular; also accept a valid paired histone/plasmid/pilus distinction at this level. ✔
(b) Membranes divide the cell into distinct regions. ✔
The nucleus OR cytoplasm OR an organelle is identified as a separate compartment. ✔
Transcription is separated from translation, OR internal membranes increase available area, OR a named compartment supports a named function. ✔
RNA can be modified before meeting cytoplasmic ribosomes. ✔
Enzymes or metabolites can be concentrated locally. ✔
Incompatible reactions/pH conditions can be kept apart, OR trafficking between regions can be controlled. ✔
Potentially damaging substances are confined, for example in lysosomes. ✔
(c) Reproduction: meiosis produces the haploid spore stage from which the gamete-producing stages develop. ✔
Reproduction: female gametes develop within ovules in the ovary. ✔
Reproduction: pollen and the male gamete-producing stage develop in anthers. ✔
Reproduction: pollination transfers pollen from anther to stigma. ✔
Reproduction: animals or wind transfer pollen between plants. ✔
Reproduction: a pollen tube conveys male gametes through the style towards an ovule. ✔
Reproduction: fertilization fuses gametes or their nuclei. ✔
Reproduction: fertilization gives rise to an embryo, OR initiates seed development. ✔
Cross-pollination: pollen and receptive stigma mature at different times. ✔
Cross-pollination: separate male and female flowers OR separate male and female plants reduce self-pollination. ✔
Cross-pollination: spatial arrangements of anthers/stigma or petals hinder self-pollen transfer. ✔
Cross-pollination: genetic self-incompatibility prevents self-fertilization. ✔
Cross-pollination: pollinator-attracting or pollen-capturing features assist transfer, such as scent, nectar, conspicuous petals or feathery stigmas. ✔
Schemat punktowania
(a) Award any 3 paired structural distinctions, maximum 3; both cell categories must be clear. (b) Award any 4 points, maximum 4. (c) Award any 8 points with at most 6 from reproduction, maximum 8. The meiosis point preserves the role in the sexual life cycle without incorrectly claiming that flowering-plant gametes are directly produced by meiosis. Award 1 independent quality mark for a clear and concise whole response with little irrelevant repetition. Maximum 16 overall.