Question 24 Which best explains how Australia has distinctive organisms, such as

Question

Question 24 Which best explains how Australia has distinctive organisms, such as marsupials, that cannot be found anywhere else on Earth? O a. There are fewer species of organisms in Australia than most continents. O b. Australia was separated and isolated from other land masses for a long period of time. O c. Australia has an unusual climate that has triggered natural selection. O d. Australia experienced a significantly slower rate of evolutionary change O e. The predators of marsupials eliminated the populations in other locations

Explanation / Answer

Q1

option B is correct

The fundamental reason, Australia has such "strange and unusual" animals was due to continental drift. For many years the Australian mainland was so far from the other continents that there was no possibility for new kinds of creatures to get to it. So the creatures that were at that point on the mainland Australian continent evolved, into animals most suitable for the Australian environment

Qno 2

option C is correct

habitat isolation prevails when two species that could interbreed but, do not because the species live in different areas.

as given in question that black bear and brown bear lives in woods and river respectively, but don't interbreed, that must be due to habitat or ecological isolation

Qno 3

option A is correct

1 The first whales evolved over 50 million years ago, and the ancestor were terrestrial.

2 fossil records clearly indicate their resemblance with a hippo( which is four-legged

3 First whales, such as Pakicetus, were typical land animals. They had long skulls and large carnivorous teeth.

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