If relatively small carbonaceous chondrites from space were a significant source of Earthʹs original amino acids, then which two of these would have been most important in permitting their organic materials to survive impact with Earth?

I. Carbonaceous chondrites must contain no D-amino acids.

II. Earthʹs early atmosphere must have had little free oxygen.

III. The chondrites must have arrived on Earth before 4.2 billion years ago.

IV. Earthʹs early atmosphere must have been dense enough to dramatically slow the chondrites before they impacted.

V. The chondrites must have impacted land, rather than a large body of water.

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#Question id: 20538

#SCPH01 Biochemistry

Aromatic hydrocarbons including benzene, toluene, ethylbenzene and xylene collectively referred as BTEX compounds. Which of them is considered as carcinogenic?

TLS Online TPP Program

#Question id: 20538

#SCPH06 I Botany

Aromatic hydrocarbons including benzene, toluene, ethylbenzene and xylene collectively referred as BTEX compounds. Which of them is considered as carcinogenic?

TLS Online TPP Program

#Question id: 20538

#SCPH28 | Zoology

Aromatic hydrocarbons including benzene, toluene, ethylbenzene and xylene collectively referred as BTEX compounds. Which of them is considered as carcinogenic?

TLS Online TPP Program

#Question id: 20539

#SCPH01 Biochemistry

Aromatic hydrocarbons including benzene, toluene, ethylbenzene and xylene collectively referred as BTEX compounds. Which of them are not considered as carcinogenic?

1. Benzene

2. Toluene

3. Ethylbenzene

4. Xylene

Which of them is a correct option?

TLS Online TPP Program

#Question id: 20539

#SCPH06 I Botany

Aromatic hydrocarbons including benzene, toluene, ethylbenzene and xylene collectively referred as BTEX compounds. Which of them are not considered as carcinogenic?

1. Benzene

2. Toluene

3. Ethylbenzene

4. Xylene

Which of them is a correct option?

TLS Online TPP Program

#Question id: 20539

#SCPH28 | Zoology

Aromatic hydrocarbons including benzene, toluene, ethylbenzene and xylene collectively referred as BTEX compounds. Which of them are not considered as carcinogenic?

1. Benzene

2. Toluene

3. Ethylbenzene

4. Xylene

Which of them is a correct option?