MCQ
Blood circulation in insects is:
- AFlows in arteries and veins
- BWith red blood corpuscles
- COpen type
- DAbsent
Explanation:
The blood circulatory system of insects is the open type where hemolymph flows freely within the body cavity or hemocoel. There are a heart and aorta but no capillaries and veins. The circulatory system consists of a body cavity or sinus, heart, and hemolymph.
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Which of the above hormones are polypeptide in nature?
Choose the correct option
| Genus name | Two characters | Class/Phylum | |
| $(a)$ | Ascaris | $(i)$ Body segmented | Annelida |
| $(ii)$ Males and females distinct | |||
| $(b)$ | Salamandra | $(i)$ A tympanum represents ear | Amphibia |
| $(ii)$ Fertilization is external | |||
| $(c)$ | Pteropus | $(i)$ Skin possesses | Mammalia |
| $(ii)$ Oviparous | |||
| $(d)$ | Aurelia | $(i)$ Cnidoblasts | Coelenterata |
| $(ii)$ Organ level of organization |