Spider belongs to which of the following classes in the phylum arthropoda?
A. Arachnida B. Chilopoda C. Crustacean D. Insect E. Myriapoda Correct Answer: Option A – Arachnida
The group of organisms at the base of the pyramid of numbers are?
A. decomposers B. primary consumers C. producers D. secondary consumers E. tertiary consumers Correct Answer: Option C – producers
The type of association in which one organism benefits and the other neither benefits nor is harmed is called?
A. commensalism B. mutualism C. parasitism D. saprophytism E. symbiosis Correct Answer: Option A – commensalism
Amoeba engulfs food particles by means of its?
A. contractile vacuole B. cytoplasmic membrane C. food vacuoles D. nucleus E. pseudopodia. Correct Answer: Option E – pseudopodia
Which of the following is a biotic factor that affects population?
A. Predator B. Salinity C. Space D. Temperature E. Water Correct Answer: Option A – PredatorProducts
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