Practise IB Biology HL D3.1 with evidence-led questions on gamete formation, fertilization, reproductive hormones, pregnancy, development and contraception.
148 questions in this syllabus scope, with question parts counted together.
117 papers analysed · Tagging incomplete
What is a definition of a clone?
A group of cells derived from a single parent cell
Differentiated cells that retain the capacity to divide
A fetus developed specifically for medical use
A group of cells that have lost the ability to differentiate
Which cell is a polyploid zygote produced by fusion of one haploid and one diploid gamete?
No public sample questions are available for this syllabus point yet.
The diagram shows the human female reproductive system.
What is produced by structure X ?
FSH
X chromosomes
Fertilized eggs
Estrogen and progesterone
What event occurs approximately at the time of the dotted line (time X )?
Menstruation
Ovulation
Development of the primary follicle
Implantation
Describe the process of fertilization in humans.
For what reason are daily FSH injections given during IVF treatment?
To suppress the natural menstrual cycle
To induce the ovary to produce more eggs than normal
To prepare the lining of the ovary for embryo transfer
To prevent the development of multiple embryos
The diagram shows a cross-section of a flower.
What describes the structure labelled Z ?
Structure Z is the anther, which is part of the stamen.
Structure Z is the stigma, which is part of the stamen.
Structure Z is the anther, which is part of the carpel.
Structure Z is the stigma, which is part of the carpel.
The drawing shows a flower of red valerian, Centranthus ruber.
Structure IV contains a gland that secretes a sugary liquid. Suggest a benefit to the plant of secreting this liquid.
Flowering plants can use either self-pollination or cross-pollination when they carry out sexual reproduction. Which plants are most likely to cross-pollinate?
Plants that are hermaphrodites
Plants whose anthers and stigmas mature at the same time
Plants with flowers that have much longer stamens than stigmas
Plants that are either male or female
The image shows a cell in the anther of a lily (Lilium sp.) plant during the first division of meiosis.
The diagram shows a cross section through a broad bean (Vicia faba) seed.
On the diagram, label the cotyledon.
Outline the function of the cotyledon.
What controls the developmental changes during puberty?
I. Increased release of gonadotropin-releasing hormone (GnRH) by the hypothalamus
II. Luteinizing hormone (LH) leading to increased sex hormone production
III. Gonadotropin-releasing hormone (GnRH) triggering the onset of increased luteinizing hormone (LH)
I and II only
I and III only
II and III only
I, II and III
Gametogenesis produces sex cells for sexual reproduction.
What distinguishes oogenesis from spermatogenesis in humans?
The first meiotic division starts at puberty.
Mitosis produces many cells for gametogenesis.
Unequal division of cytoplasm occurs at cytokinesis.
Haploid gametes are produced at the end of meiosis II.
The diagram shows the location of the zona pellucida, a layer of glycoproteins on the human ovum.
What is the main function of the zona pellucida?
To prevent polyspermy
To form polar bodies
To provide amino acids
To release FSH
What is a blastocyst?
An unfertilized egg surrounded by follicle cells
An unfertilized egg cell expelled by menstruation
The follicle when it has swelled up with fluid
The embryo when it has become a hollow ball of cells
What is used in a pregnancy test kit?
Monoclonal antibodies against hybridoma cells
Antibodies against monoclonal hybridoma cells
HCG produced by plasma cells fused with tumour cells
Monoclonal antibodies produced by hybridoma cells against HCG
Which statement applies to the placenta?
Carbon dioxide diffuses from fetus to mother across the placenta.
Maternal and fetal blood mix at the placenta.
If an ovum is not fertilized the placenta is lost during menstruation.
The umbilical cord connects the placenta to the mother's abdomen.
The diagram shows the position of the fetus at childbirth.
Which hormone stimulates contractions of muscle cells in the region labelled X ?
Estrogen
Oxytocin
Progesterone
Thyroxin
No public sample questions are available for this syllabus point yet.
