The phylum is a group of animals that contains spiders, crabs, and fish spiders,

Question

The phylum is a group of animals that contains spiders, crabs, and fish spiders, sea urchins, and insects scorpion, crabs, and insects scorpion, earthworms, and insects An open circulatory system means that blood flows through blood vessels in vessels blood is located in the body cavity and is not contained there is no at all or even a pulsatile vessel or organ What controls when an insect molts? ecdysone concentrations juvenile hormone concentrations nutrition environmental temperature all of the above The base temperature of the cabbage lopper development is 10 degree C, and it takes degree-day from hatching to become a pupa. How many days it will take the cabbage loppe from hatching to pupation if we have days with average temperature of25 degree C? 8 days 12 days 16 days 20 days Which of the following are scientific names of insects Potato bug Culex pipiens Long-nose weevil Western honey bee About sclerotization, which one is NOT RIGHT? results in reduction of water content makes the exoskeleton more resistant to degradation darkens in color after molting assists insect fly and jump

Explanation / Answer

8) answer -c)scorpion, crabs and insects.

The major classes of phylum arthropod are insects, arachnids ,millipedes and centipedes. Fish is under phylum chordate. Sea urchin is phylum echinoderm. Earthworm is phylum annelid.

9) answer - b) open circulatory system means blood is located in body cavity and is not contained in vessels.

Heart or pulsatile organ is present in open circulatory system .

10)answer - a) ecdysone concentration is the hormone that stimulates the insect to molt.

Juvenile hormone concentration affects metamorphosis in insects. Nutrition and environmental temperature do not affect molting.

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12)answer -b)Culex pipiens is the scientific name of a specific species of mosquito. Other names are common names of insect.

13)answer -d)assists insect fly and jump. All other options are related to sclerotization but fourth option is due to the action of elastic exoskeleton .

  

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