Zadanie 4c
Foxgloves are hermaphroditic flowering plants. Discuss how these plants can generate genetically varied offspring.
Reproduction
Umiejętności w tym dziale
Umiejętności z tego działu sprawdzają 44 zadania wzorowane na arkuszach IB z lat 2022–2026. Dział pojawia się w 27 z 54 arkuszy w bazie.
Zadania z tego działu: 44 Otwórz w wyszukiwarce z filtrami
Zadanie 8
Sexual life cycles can produce new combinations of inherited traits. (a) Draw and label a section of an insect-pollinated flower, indicating the structures associated with male and female gamete production. (b) Explain the sources of variation arising through…
Zadanie 28
Which hormonal pattern promotes the onset of childbirth in the guide-level model of labour? A. Oxytocin falls and progesterone rises B. Both oxytocin and progesterone rise without limit C. Oxytocin rises while progesterone falls D. Both oxytocin and…
Zadanie 29
During human fertilization, most of the sperm structure is dismantled after entry. Which sperm component joins an egg structure as the two cells initially fuse? A. The flagellar microtubule bundle joins the egg nucleus B. The acrosomal cap becomes the egg…
Zadanie 29
A testicular germ-cell lineage produces mature sperm. Which order correctly summarizes the main stages? A. Differentiation, meiosis I, mitotic multiplication B. Mitotic multiplication, meiosis I and II, differentiation C. Meiosis II, mitotic multiplication,…
Zadanie 29
After fertilization, the first division of the human zygote normally takes place while it is in which labelled structure? A. Structure A B. Structure B C. Structure C D. Structure D
- Materiał graficzny
Zadanie 32
A urine test strip is designed to detect the hormone released following early embryo implantation. Which target makes it useful as a pregnancy test? A. Human chorionic gonadotropin B. Progesterone alone C. Oestradiol alone D. Prolactin
Zadanie 8
A flowering plant can reproduce sexually or form new individuals by vegetative growth. (a) Explain why both meiosis and gamete fusion are needed in a sexual life cycle. (b) Describe how interphase and mitosis preserve chromosome number during vegetative…
Zadanie 29
In this longitudinal flower diagram, which description identifies X and the reproductive organ to which it belongs? A. X is a stigma belonging to a carpel B. X is an ovule belonging to a stamen C. X is an anther belonging to a stamen D. X is a sepal belonging…
- Materiał graficzny
Zadanie 29
In an apple variety, pollen sharing the relevant incompatibility specificity with the maternal plant is rejected. What is a reproductive benefit of this mechanism? A. It prevents all changes in allele frequency B. It ensures that every ovule is fertilised by…