Which of the following is not an example of temperate grasslands?

Which among the following indicate sustainable resource utilization?

1. Disposal of solid municipal waste in an open landfill at a rural location
2. Commercial fishing only in open oceans beyond the continental shelf
3. Paving roads and highways with recycled automobile tire and glass waste

Select the correct option from the codes given below:

Mammalian lungs have an enormous number of minute alveoli (air sacs). This provides:

Which among the following is / are egg laying mammals?

1. Platypus
2. Echidna
3. Otter
4. Koala

Select the correct option from the codes given below:

Consider the following statements about DISANET, which was recently in news:

1. It is a low-cost communication system developed by IIT Madras
2. It will enable rescue workers to communicate with a locally established centre during natural disasters

Which of the above statements is/are correct?