Summary
Highlights
The female hormone question is a highly weighted topic, possibly split into two parts: one on the structures of the female reproductive system and their role in the ovarian cycle, and another heavily focused on hormones. A case study about blocked fallopian tubes or endometriosis is anticipated. FSH is expected to be a key hormone discussed, particularly in relation to the ovarian cycle (follicle to corpus luteum) and its negative feedback on estrogen and progesterone. Homeostasis questions might involve carbon dioxide's role in body pH regulation, potentially combining with ADH or thermoregulation in an exercise scenario.
Plant hormone questions will likely include geotropism, potentially with classic experiments involving seeds on a klinostat. Gibberellins, often overlooked, are predicted to be emphasized, focusing on their role in lateral branching and physical defenses like thorns. Reproductive strategies (oviparous, viviparous), likely involving fish or reptiles, will differentiate internal vs. external egg development. The amniotic egg might involve a drawing of the human ovum, and a comparison table between amniotic eggs and ova. Questions about insufficient amniotic fluid and the functions of structures like chorion, placenta, and amnion are also expected.
Ear questions will be in-depth, focusing on posture maintenance and the Eustachian tube's role in equalizing ear pressure. The reflex arc is predicted to make a comeback, possibly integrated with a disease like Alzheimer's, asking about its causes (plaque buildup, degenerative disease) and effects on reflexes. The distinction between a reflex arc and a reflex action is crucial.
The video introduces the 2025 Paper 1 Life Sciences exam prediction, highlighting the availability of cheat sheets for various subjects. The presenter, an experienced Life Sciences teacher and examiner, emphasizes that these are educated guesses based on her extensive experience and trend analysis, not leaked information. She aims to guide students to cover all necessary topics and understands examiner's focus.
Multiple-choice questions are predicted to focus on plant hormones and responses (tropisms, defense mechanisms, auxins for weed control). The amniotic egg, particularly its layers, structures, and the importance of the yolk, is also expected to appear. Homeostasis, including thermoregulation and the endocrine system (all hormone names), along with receptor cells of the eye (rods, cones, retina) and ear (macula, organ of corti), are key areas.
For terminology, expect questions on the 'oval window' as it's often overlooked or confused with the 'round window'. Ear bones (ossicles: stirrup, hammer, anvil) and their specific names and order are important. Larger nervous system structures like the brain's ventricles and corpus callosum, their functions, and neuron parts like the axon and dendrite are also predicted. Unusual hormones such as prolactin, adrenaline, and growth hormone (GH) are highlighted, along with the distinction between exo- and endocrine glands.
This section often tests similar terms that can be easily confused. Examples include cranial vs. spinal nerves, sympathetic vs. parasympathetic nervous systems, and endocrine vs. exocrine glands. Questions might also focus on functions of similar-sounding hormones like FSH and LH.
These questions will be heavily diagram-based. A nervous system diagram (brain) requiring identification of structures like the medulla oblongata, spinal cord, cerebrum, and cerebellum, along with knowledge of their functions, is expected. A basic female reproductive system diagram with questions on structures like the fallopian tube, egg, sperm, and implantation is also predicted. Students should also be prepared to draw tables, graphs, or diagrams.
Question 2 often covers reproduction and the nervous system, while Question 3 focuses on homeostasis, the endocrine system, and plant hormones, often including an investigation question. The eye, specifically accommodation, binocular vision, rods and cones for color and low-light vision, and astigmatism correction, is a strong prediction. Spermatogenesis questions, possibly as a case study on sperm production and diet, are also anticipated.