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Test Yourself

1

After how many days and hours are the opossums young expelled into the outside world?

a) 5 days and eighteen hours
b) 12 days and eighteen hours
c) 19 days and eight hours
d) 8 days and nineteen hours
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2

How many species of oposums are there in America?

a) Twenty seven
b) Seventy two
c) Sixty even
d) Seventy six
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3

Early marsupials could have spread across into the Australian Antartic block by way of?

a) Swimming
b) Island hopping
c) Boats
d) Flying
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4

The carnivorous marsupials that will tackle reptiles and nestling birds are called marsupial?

a) cats
b) dogs
c) lions
d) wolves
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5

Kangaroos can reach speeds of up to 60 kph and clear fences nearly?

a) 4.5 metres high
b) 5 metres high
c) 3 metres high
d) 1.5 metres high
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6

How many eggs does the duck-billed platypus lay in the underground nest?

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7

Which marsupial had invaded North America?

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8

What was the Thylacoleo specimen also known as?

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9

Which part of the body does the Boodie use to secure the packed straw while hopping?

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10

How many pairs of cheeck teeth does the kangaroo have on either side of it's jaws?

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11

The duck-billed platypus hunt for aquatic invertebrates using it's bill.

a) True
b) False
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12

Mammals are warm-blooded and could therefore be active at night when the great reptiles become torpid.

a) True
b) False
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13

When the Yapok goes swimming it's pouch remains open thus making the young susceptible to drowning.

a) True
b) False
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14

Both the female marsupial mole and the female placental mole possess a pouch.

a) True
b) False
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15

It takes the kangaroo neonate 30 minutes to journey to it's mother's pouch.

a) True
b) False
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16

The placental foetus risks immunological rejetion because it's tissues are not genetically the same as the mothers'.

a) True
b) False
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17

Whales and seals can carry their unborn young as they swim for months through the freezing seas.

a) True
b) False
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18

Fill in the missing words.

The duck-billed Ornithorhynchus anatinus (bird-billed) from Australia is animal belonging to the most primitive order of (Monotremata). This animal is the size of a , possesses thick fur, webbed and clawed feet, a combining both excretory and reproductive functions and a large pliable flat like a duck's

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Word bank: beak, cloaca, mammals, platypus, rabbit

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19

Fill in the missing words.

At the beginning of each season the Echidna female develops a small into which she later transfers her single . The mammary glands discharge directly into the pouch and the is sucked of the hairs.The Echidna and Platypus are of great antiquity, but we have no hard evidence to indicate which reptiles were their ancestors.

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Word bank: egg, fossil, mating, milk, pouch

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20

Fill in the missing words.

Both Platypus and Echidna became highly specialised for foraging and ant eating respectively and consequently their teeth (although young Platypuses still three tiny ones soon after birth which are lost in a very short time). We therefore have virtually nothing to help us these creatures to any group of fossil reptiles.

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Word bank: link, lost, produce, underwater

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21

Fill in the missing words.

It wa hypothesized that mammals had a origin (derived from more than one ancestor) rather than a origin (derived from a single ancestor). Recent evidence based on the skull of Probainognathus is argued for monophyletic origin for the mammals. Much of this debate depends on whether the advanced were reptiles or represented the first mammals.

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Word bank: monophyletic, morphology, polyphyletic, theriodonts

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22

Fill in the missing words.

About 135 million years ago the large single land mass (Pangaea) split into two a northern supercontinent called comprising today's , Asia and North America; and in the south, another super-continent called made up of South America, , Antarctica and Australia.

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Word bank: Africa, Europe, Gondwana, Laurasia

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23

Fill in the missing words.

Mammals were to develop a different way of their young. Instead of them at a very early stage into an external pouch, they them within the body of the female and them by means of a device called the placenta.

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Word bank: nourishing, retained, supported, transferring

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24

Fill in the missing words.

The allows the young to remain within the for a very long time. It is a flat disc that becomes attached to the wall of the uterus and is connected by the to the foetus. The junction with the uterine wall is highly convoluted so that the surface area between the placenta and the is very great.

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Word bank: maternal tissues, placenta, umbilical cord, uterus

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25

Fill in the missing words.

itself does not pass from mother to young, but from her lungs and derived from her food both dissolved in her blood, diffuse across the and so enters the blood of the foetus. There is also traffic in the other direction.

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Word bank: Blood, junction, nutrients, oxygen

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26

Fill in the missing words.

Only the front of the kangaroo engage. As they are worn down to the , they fall out and those from the rear forward to take their place. By the time the animal is fifteen or twenty years old, its molars are in use.

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Word bank: last, migrate, molars, roots

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27

Fill in the missing words.

The sugar gliders Petaurus spp. are small leaf and eating marsupials that live in trees. They have a parachute of skin connecting its fore and hind legs which enable them to from branch to branch and resemble almost exactly the North American flying (Petaurista alborufus)

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Word bank: blossom, eucalyptus, glide, squirrel

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28

Match the following.

a) This marsupial was as large as a tiger; possessed a short skull and tremendously elongated bladelike upper canine tooth.
b) An animal approximately a metre long, possessing a large dog-like skull with highly specialized and differentiated teeth.
c) The body was long, limbs exceptionally strong and the feet were equipped with exceptionally sharp claws.
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29

Match the following.

a) A flightless bird
b) Locomote using only it's back legs which ahve very long feet
c) An ant-eating marsupial possessing a long sticky tongue
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30

Match the following.

a) This grazer has molars with closed roots and therefore have to compensate for that.
b) This opossum is almost the size of an small otterand has webbed feet.
c) This animal became highly specialised for underwater foraging and ant eating.
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