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Rabies, leptospirosis and avian influenza can each be transmitted from non-human animals to people. Which category includes all three? A. Inherited metabolic disorders B. Diseases restricted to red blood cells C. Zoonoses D. Diseases caused only by bacteria
The model shows an interaction between immune cells, followed by formation of two cell types. What do labels P, Q and R represent? A. P: plasma cell; Q: glucose; R: helper T cell B. P: phagocyte; Q: antibody; R: red blood cell C. P: memory B cell; Q: lipid; R:…
Which identifications match P, Q and R in this simplified male reproductive-system diagram? A. P: epididymis; Q: urethra; R: prostate B. P: testis; Q: sperm duct; R: seminal vesicle C. P: testis; Q: ureter; R: epididymis D. P: prostate; Q: sperm duct; R:…
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…
Which illness is a zoonosis that can reach humans from an infected mammal? A. Phenylketonuria B. Coronary atherosclerosis C. Rabies D. Type 1 diabetes
At a locus showing incomplete dominance in snapdragons, homozygous crimson and ivory plants produce only pale-rose heterozygotes. What phenotypic proportions are expected when two of these heterozygotes are crossed? A. Half crimson and half ivory, with no…
In a snapdragon line showing incomplete dominance, crimson homozygotes and ivory homozygotes produce pale-rose heterozygotes. A pale-rose plant is crossed with an ivory plant. Which result is expected? A. Only crimson offspring B. Crimson and ivory offspring…
Which event allows the maternal and paternal chromosomes to assemble on the first mitotic spindle after human fertilization? A. Both chromosome sets undergo a new meiotic division B. The pronuclear envelopes break down C. Paternal chromosomes are digested…
A warm environment raises a person’s core temperature. Which response helps increase heat loss? A. More shivering contractions B. Constriction of skin arterioles C. Dilation of skin arterioles D. Increased uncoupled heat production
After dinner the glucose concentration falls from its peak towards baseline. Which response could produce this decrease? A. Glucagon stimulates conversion of glycogen to glucose B. Insulin promotes uptake of glucose and its storage as glycogen C. Insulin…