Question

1. Roundworms have special organs of excretion called nephridia.
2 Warm-blooded animals change their body temperature with the surroundings
3. Some bacteria like Rhizobium live in the root nodules of leguminous plants like neem
4. Moulds respire both aerobically and anaerobically
5. Molluscs have sharp spines all over their body.
6. Mammalians have internal ears, nose and specialised teeth.​

Answer 1

Answer:

1) false , roundworm doesn't have nephridia they have renette glands which help in excretion.

2) true, warm blooded can regulate temperature that is why they are called as homeotherms.

3) false, Rhizobium fix nitrogen in leguminous plants like pulses(moong, arhar etc)

5) false, molluscs are spongy and soft forms a mantle over the hump

6) false, mammals have external ears and nose.