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Question Numbers: 76-80
In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
Deoxyribonucleic acid (DNA) is a very special molecule. It (1) _______ as the code for all life on Earth, holding the cellular instructions to (2) _________ everything from a beetle to a human. Because DNA is (3) __________ to each species, it's like a product barcode in a supermarket. As animals and plants live their lives, they (4) ______ fragments of their DNA into their environment (5) _________ dead skin, hair, saliva, scat, leaves or pollen. These traces make up environmental DNA. There's enough DNA in water and even air to tell species apart.
In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
Deoxyribonucleic acid (DNA) is a very special molecule. It (1) _______ as the code for all life on Earth, holding the cellular instructions to (2) _________ everything from a beetle to a human. Because DNA is (3) __________ to each species, it's like a product barcode in a supermarket. As animals and plants live their lives, they (4) ______ fragments of their DNA into their environment (5) _________ dead skin, hair, saliva, scat, leaves or pollen. These traces make up environmental DNA. There's enough DNA in water and even air to tell species apart.
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