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Among bony fishes, shark, land snails, a...

Among bony fishes, shark, land snails, aquatic amphibians, crocodiles in water, birds, aquatic insects, earthworm during rainy season, liver flukes and rabbit, how many of them are ammonotelic?

A

Seven

B

Five

C

Six

D

Eight

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Ecological Indicators The presence of dragonflies can reveal changes in the water ecosystems more quickly than studying other animals or plants. In fact, from the nymph to the adult stage, the dragonfly has a significant, positive ecological impact. Dragonfly eggs are laid and hatched in or near water, so their lives impact both water and land ecosystems. Once hatched, dragonfly nymphs can breathe underwater which enables them to eat mosquito larvae, other aquatic insects and worms, and even small aquatic vertebrates like tadpoles and small fish and in the air. Adult dragonflies capture and eat adult mosquitoes. Community wide mosquito control programs that spray insecticides to kill adult mosquitoes also kill dragonflies. Assertion: Releasing dragonflies in areas where there is an outbreak of malarial diseases can be an environment friendly method of control. Reason: Dragon flies are dominant species and will not allow mosquitoes to reproduce

Ecological Indicators The presence of dragonflies can reveal changes in the water ecosystems more quickly than studying other animals or plants. In fact, from the nymph to the adult stage, the dragonfly has a significant, positive ecological impact. Dragonfly eggs are laid and hatched in or near water, so their lives impact both water and land ecosystems. Once hatched, dragonfly nymphs can breathe underwater which enables them to eat mosquito larvae, other aquatic insects and worms, and even small aquatic vertebrates like tadpoles and small fish and in the air. Adult dragonflies capture and eat adult mosquitoes. Community wide mosquito control programs that spray insecticides to kill adult mosquitoes also kill dragonflies. The approach to biological control includes:

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AAKASH INSTITUTE-TEST 6-EXAMPLE
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  2. Select incorrectly matched pair

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  3. Among bony fishes, shark, land snails, aquatic amphibians, crocodiles ...

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  4. Proximal convoluted tubule differs from distal convoluted tubule of ne...

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  5. All of the following factors during regulation of renal function decr...

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  6. Blood test ofa person shows glucose level to be 130 mg per 100 ml of ...

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  7. Which of the following is an incorrect match w.r.t. animal and its exc...

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  8. Which of the following statement is incorrect?

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  9. Joint between atlas and axis is

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  10. Tetanus differs from tetany in having

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  11. Which of the following is correct match w.r.t. bone and its total numb...

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  12. All the following are unpaired cranical bones of skull in human , exc...

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  13. Which of the following human bone is incorrectly matched with its desc...

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  14. Which of the following statement is incorrect w.r.t. ribs?

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  15. Unipolar type of neuron is usually found in the

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  16. Which of the following is a correct difference between electrical and ...

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  17. Aqueduct of sylvius connects

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  18. Visual reflex involves control and coordination movements of head and ...

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  19. Which of the following is a conditioned reflex action?

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  20. Vestibular apparatus of the internal ear includes - (a) crista ampulla...

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