Which of the following provide evidence that south america, africa, antarctica, and australia were once together as one supercontinent? select the three correct answers.
cratons match across the edges of continents.
glacial deposits and scratches in the bedrock from an ice sheet match in distant regions.
icy glaciers covered south america, africa, antarctica, and australia as one supercontinent over the north pole.
fossils of marsupials were originally the same across south america and australia.
vast deposits of coal formed in regions with ancient deserts.
mountain chains match up where south america collided with australia to form pangaea.

Option (1), (2) and (4)

Explanation:

The continents were all together once, which was commonly known a the Pangaea. The Pangaea then slowly started to break forming different sub continents namely the South America, Africa, Australia and Antarctica. There are evidences that suggests that these continents were earlier attached together. Some of them, are as follows-

(a) These continents shared cratons whose edges are similar and perfectly fits with one another, suggesting that they were together in the geological past.

(b) Numerous ice age events has taken place during the time of Pangaea super-continent, that produced the scratches over the surface of continents. These scratches along with glacial deposits are still found at many places on earth. This also provides a good evidence that these continents were all together once.

(c) The fossils of marsupials have been found at many places in South America and Australia, that belonged to the mammalian group. They were extensively present in these two continents in the past.

Hence, the correct answers are option (1), (2) and (4).

The evidences that South America, Africa, Antarctica, and Australia were once together as one supercontinent include:

It should be noted that South America, Africa, Antarctica, and Australia were once a supercontinent. This supercontinent was called Gondwanaland.

The facts to support these include cratons matching across the edges of continents. Also, glacial deposits and scratches in the bedrock from an ice sheet match in distant regions. Fossils of marsupials were also the same for the continents.

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  cerebrum

2. the term "psychology" literally means:

the process or procedure of the science or study of the mind.

3. the area of the brain responsible for respiration, heart rate, and smooth muscle control of our blood vessels is t

medulla oblongata

4. the structure that conducts nerve impulses to and from the brain and serves as a reflex center for some sensory information without input from the brain is the:

spinal cord

5. the three-layered membrane that covers the brain and spinal cord and literally means membrane is called the:

meninges

6. the cord-like (string-like) structures that carry bio-electrical impulses from one part of the body to another are called

nerves

7. a group of nerve cell bodies that are found outside of the spinal cord and brain are referred to as:

ganglions or ganglia (pl.) “literal meaning knot”

8. the term that means spinal cord inflammation is:

myel/itis

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