Top 10 zoology factsZoology quiz
How do baby birds get oxygen inside their eggs?
Oxygen comes in through pores in the shell. Directly under the shell, there is a small pocket of air. The microscopic pores on the egg surface allow the CO2 to escape and fresh air to get in, so a developing bird can breathe.
Which dogs are known to eat fish?
Dingos ancestors that were brought to Australia were relatively undomesticated and closer to wild Asian gray wolf. The dingo's diet includes bandicoots, rodents, echidnas, crabs, fruits, and other plants, as well as insects (mostly beetles). On Fraser Island, dignos often eat fish.
Mules are generally known to have fertility problem. How often do mules give birth to a healthy offspring?
Very rarely. Mules are considered infertile, but there have been more than 60 documented cases of foals born to female mules around the world (some of them were even DNA-tested to verify the motherhood). There are no recorded cases of fertile mule stallions.
These large insects occupy the same ecological niche in New Zealand, as rodents do elsewhere. What is it?
Weta are very large by insect standards, with body length up to 10cm (4 inches). Their physical appearance is like a katydid, long-horned grasshopper, or cricket, but the hind legs are enlarged and usually very spiny.
Which rodent has the highest ratio of brain mass to body mass?
Beaver a large semiaquatic broad-tailed rodent that is native to North America and northern Eurasia. It is noted for its habit of gnawing through tree trunks to fell the trees in order to feed on the bark and build dams. Beaver has the highest ratio of brain mass to body weight among rodents, which is reflected in the behaviour and the ability to act not only instinctively, but also logically.
Why is this seahorse male so thick?
It is pregnant. Seahorse males deliver the babies. After mating, the fertilized eggs are embedded in the pouch wall and become surrounded by a spongy tissue. The male provides oxygen and supplies the eggs with prolactin, the same hormone responsible for milk production in pregnant mammals.
What is the main feeding behaviour of hyenas?
Hunting. Hyenas have long been regarded as being cowardly scavengers. Today they are known for killing as many as 95% of the animals they eat, and for driving off leopards or lionesses from their kills.
Which mammal cannot regulate its body temperature?
Sloth. Unlike other mammals, sloths cannot regulate their body temperatures, so they can only live in warm rainforest, where temperature varies little in the course of the year. Sloths have very low metabolic rates and maintain low and variable body temperatures (30–34°C or 86–93°F), regulating it by moving in and out of the shade in trees.
Which animal has three hearts?
Cuttlefish is a Cephalopod. Cephalopods are characterized by three hearts: the central heart, and two additional gill hearts (bronchial hearts) at the base of their gills. They have two circulatory systems: big (heart-body-gill heart) and small (gill heart-gills-heart).
Which trait makes naked mole rat a subject of intensive scientific studies?
Longevity and resistance to cancer. The life span of naked mole rat is around 30 years, while other rodents rarely live longer than a few years. Until recently it was believed that they are entirely resistant to cancer, however, in 2016 cancer was found in two individuals. Studies have revealed that the immune system of naked mole rats has an additional mechanism to identify cancerous cells.