Zapisujemy na Twoim urządzeniu to, bez czego serwis nie działa, np. zalogowanie. Plików analitycznych użyjemy tylko za Twoją zgodą. Szczegóły w polityce prywatności.
Wybierz umiejętność, rok lub poziom trudności.
Pokazujemy tylko poziomy, dla których mamy zadania.
Znaleziono 1160 zadań
Which example demonstrates artificial selection? A. A drought favours naturally occurring deeper-rooted plants B. A breeder repeatedly uses the longest-fibred plants as parents C. Birds with poorly camouflaged plumage are more often eaten D. A random storm…
In a stable environment, a heritable trait lowers survival and the number of offspring produced. What does natural selection tend to do over generations? A. Decrease the trait’s frequency B. Ensure that every individual acquires a beneficial mutation C. Pass…
Which sequence is consistent with clot formation after vessel damage? A. Platelets release antibodies that become red cells B. Fibrin is converted into all circulating plasma proteins C. Clotting factors trigger reactions that generate a fibrin network sealing…
Why does an antibiotic targeting bacterial cell-wall synthesis not directly treat a viral infection? A. Viruses have bacterial walls that are thicker than usual B. Viruses lack the bacterial cell-wall process targeted by the drug C. The antibiotic changes into…
Which scheme correctly shows the role of thrombin in forming a blood clot? A vertical arrow ending on a reaction arrow indicates catalysis. A. Scheme A B. Scheme B C. Scheme C D. Scheme D
In establishing the ionic gradients associated with a neuronal resting potential, what is the action of the sodium–potassium pump? A. It exchanges sodium outwards for potassium inwards B. It moves both ions only into the neuron C. It converts sodium ions into…
Which hormone and source are correctly paired with blood-glucose regulation? A. Insulin from the thyroid gland B. Glucagon from pancreatic alpha cells C. Melatonin from liver cells D. Thyroxin from pancreatic beta cells
An IVF protocol includes repeated follicle-stimulating hormone doses before egg collection. What is their intended effect? A. Triggering implantation directly into the ovary B. Stopping all follicle development C. Promoting development of several ovarian…
Informacja do zadań 1 a-1 f. The following datasets are hypothetical models of a severe wildfire season in a coastal region. Fires were particularly widespread from November to January. Five independent programmes estimate the carbon dioxide released during…
Informacja do zadań 1 a-1 f. The following datasets are hypothetical models of a severe wildfire season in a coastal region. Fires were particularly widespread from November to January. Five independent programmes estimate the carbon dioxide released during…