NSC Marine Sciences Marine Biodiversity and Evolution: 1.1.1 The structure represented

Question

1.1.1 The structure represented below is referred to as an/an ...

![Image of structure](https://www.deepseanews.com)

1.1.2 Sharks are ...

1.1.3 Amphibians first appeared about ... years ago.

A 100 million
B 330 million
C 500 million
D 660 million

1.1.4 Brittle stars ...

A have a central disc covered with rigid, brittle skin.
B mainly move around by actively swimming through the water.
C are mostly filter feeders.
D have a through gut with a mouth and an anus.

1.2 Give the correct scientific term/phrase for each of the following descriptions. Write only the term next to the question numbers (1.2.1 to 1.2.10) in the ANSWER BOOK.

1.2.1 The small, jointed legs with which feather stars hold onto a substrate

1.2.2 A hard, flexible protein found in skin, horns, claws and many other structures in animals

1.2.3 A pair of backward-facing, tapering appendages used by male sharks during reproduction

1.2.4 An embryo feeding strategy in some sharks where the pups hatch feed on unfertilised eggs in the ovary

1.2.5 The millions of microscopic sacs which fill the lungs of mammals

1.2.6 A stage in embryonic development when the embryo is a hollow sphere

1.2.7 The hard, dorsal, shield-like covering in turtles, tortoises and other arthropods

1.2.8 The bony plates on the ventral surface of a turtle or tortoise

1.2.9 Structures associated with the gill chambers enabling water to flow outwards

1.2.10 The blood vessels taking blood to and from the respiratory organs

1.3 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II. Write A only, B only, both A and B or none next to the question numbers (1.3.1 to 1.3.5) in the ANSWER BOOK.

1.3.1 Sea cucumbers A: belong to deuterostomes
1.3.2 Elasmobranchii A: have a prism-like digestive system B: able to constantly replace their
1.3.3 Loggerhead Turtles A: nest on KwaZulu-Natal beaches
1.3.4 Lampreys A: are eel-like parasites and feed on the blood of fish swimming around the South African
1.3.5 Reptiles' circulatory system A: includes a four-chambered heart and is similar to an open system

1.1.1 The structure represented below is referred to as an/an .. - NSC Marine Sciences - Question 1 - 2022 - Paper 2

Worked Solution & Example Answer:1.1.1 The structure represented below is referred to as an/an .. - NSC Marine Sciences - Question 1 - 2022 - Paper 2

The structure represented below is referred to as an/an ...

Sharks are ...

Amphibians first appeared about ... years ago.

Brittle stars ...

1.2.1 The small, jointed legs with which feather stars hold onto a substrate

1.2.2 A hard, flexible protein found in skin, horns, claws, and many other structures in animals

1.2.3 A pair of backward-facing, tapering appendages used by male sharks during reproduction

1.2.4 An embryo feeding strategy in some sharks where the pups hatch feed on unfertilised eggs in the ovary

1.2.5 The millions of microscopic sacs which fill the lungs of mammals

1.2.6 A stage in embryonic development when the embryo is a hollow sphere

1.2.7 The hard, dorsal, shield-like covering in turtles, tortoises and other arthropods

1.2.8 The bony plates on the ventral surface of a turtle or tortoise

1.2.9 Structures associated with the gill chambers enabling water to flow outwards

1.2.10 The blood vessels taking blood to and from the respiratory organs

1.3.1 Sea cucumbers

1.3.2 Elasmobranchii

1.3.3 Loggerhead Turtles

1.3.4 Lampreys

1.3.5 Reptiles' circulatory system

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