Which statements are correct regarding chemical evolution?

1. Organic molecules formed abiotically

2. Oxygen-rich atmosphere aided synthesis

3. Energy sources included lightning

4. Protobionts preceded true cells

TLS Online TPP Program

#Question id: 39077

#Zoology

Assertion (A): Arthropods possess jointed appendages.

Reason (R): Chitin is the main component of arthropod exoskeleton.

TLS Online TPP Program

#Question id: 39077

#Life Sciences

Assertion (A): Arthropods possess jointed appendages.

Reason (R): Chitin is the main component of arthropod exoskeleton.

TLS Online TPP Program

#Question id: 39078

#Zoology

Assertion  (A) : Mammals are endothermic animals.

Reason (R): Presence of hair and sweat glands helps in thermoregulation

TLS Online TPP Program

#Question id: 39078

#Life Sciences

Assertion  (A) : Mammals are endothermic animals.

Reason (R): Presence of hair and sweat glands helps in thermoregulation

TLS Online TPP Program

#Question id: 39079

#Zoology

 Match Column I with Column II

Column I (Phylum/Class)	Column II (Characteristic)
A. Porifera	1. Water vascular system
B. Annelida	2. Canal system
C. Echinodermata	3. Metameric segmentation
D. Arthropoda	4. Jointed appendages

TLS Online TPP Program

#Question id: 39079

#Life Sciences

 Match Column I with Column II

Column I (Phylum/Class)	Column II (Characteristic)
A. Porifera	1. Water vascular system
B. Annelida	2. Canal system
C. Echinodermata	3. Metameric segmentation
D. Arthropoda	4. Jointed appendages