Quiz Answers
- To create fertile eggs (only females drink blood). They also urinate whilst drinking the blood to balance salt levels and shed some weight before take-off. Talk about rubbing salt in the wound!
- True. The lower gravity in space takes a load off an astronaut's joints and spine, giving them up to an extra 5cm to 7cm in height.
- Peak temperature of lightning (over 20 000 Kelvin), surface of the sun (over 5000 Kelvin), the filament of a tungsten light bulb (over 2500 Kelvin), molten lava (over 1000 Kelvin).
- The occipital lobe.
- Either, depending on the environment. Aphids have the remarkable ability to produce live clones or fertilised eggs based on environmental conditions. CSIRO scientists have shown that the pea aphid can even produce offspring with different physical characteristics in response to changes in temperature, day length or the availability of food.
