Which type of white blood cell produces specific antibodies against antigens?

Which plant hormone signals guard cells to close stomata during drought conditions?

What is the term for organisms that maintain a stable internal environment despite external changes?

Which part of the eye is the coloured ring that controls pupil size regulating light entry?

Which process by which bacteria take up free DNA from their environment was discovered by Griffith?

Which structure in flowering plants contains ovules that develop into seeds after fertilisation?

Which type of muscle is under voluntary control and attached to bones to enable movement?

Which type of plant reproduction involves new plants growing from cuttings runners or bulbs?

Which disease is caused by Mycobacterium tuberculosis primarily affecting the lungs?

What is the role of helper T cells in coordinating the immune response?

Which layer of the skin contains melanocytes that produce the pigment responsible for skin colour?