Question

Only poisonous lizard of the world is
(a) Heloderma
(b) Ophiosaurus
(c) Phrynosoma
(d) Varanus

Answer 1

Lizards are reptiles that are scaly skin and have a slender tail. The weight of the lizard can vary according to their species from 0.5 grams to 150 kilograms. These lizards are commonly called Gila monsters and are carnivorous.

Complete step by step answer:
The only poisonous lizard of the world is Heloderma. It is commonly known as the Gila monster which is a species of venomous lizard. It is native to the southwestern United States and the northwestern Mexican state of Sonora. It is the slowly moving lizard which is heavily awaited and is about 60 cm long. It shows some threats to humans. It has acquired a fearsome that's why it is sometimes killed despite being protected by the laws. The tell constitutes about 20% of the body size. They are found in the succulent desert, oak Woodland, under rocks with access to moisture, and seek shelter in burrows.

Additional information:
Ophisaurus: Ophisaurus is known as a glass lizard because the tail is easily broken off. They can grow to about 105 cm. The length constitutes the lizard's head and body to about $30\%$ to $35\%$ of its total length. It contains no legs but can easily distinguish from a snake by its movable eyelids, non-expendable jaws, and the scales on the lower and upper sides of the body which are of equal size.
Phrynosoma: Phrynosoma is also known as horned lizards which can squat blood which is derived from modifications to cephalic circulation. The vascular pressure gets increased due to the restriction of blood flow from the head and subsequent contraction of oculi muscles which rupture the capillaries in and around the eyes and cause a thin stream of blood to eject. This defense mechanism is effective against some memory and predators.
Varanus: Varanus is also known as monitor Lizard which is distributed to the parts of southeast Asia and West Asia. They are terrestrial and their length ranges from about 61 to 175 cm from the tip of the snout to the end of the tail. Young monitors are more arboreal whereas the adults hunt on the ground mainly on arthropods, small terrestrial vertebrates, ground birds, fishes, and eggs. They have minute scales on their body which are rougher in patches.
So, the correct answer is 'Heloderma'.

Note: The dangerous lizard known is the Komodo dragon. Lizards have over 6000 different species. Lizards can move their eyelids easily and voluntarily.lizards can live anywhere they don’t need to be near water. Lizards are cold-blooded and they need sunshine to survive longer. Lizards live on a varied diet as they don't drink much water throughout the day. The tale of the lizard is very strong and they have several defense mechanisms.