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Biology

Biology
Which of the following hormone is called the emergency harmone ?

Insulin
Oxytocin
Adrenaline
Estrogen

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Biology
Prokaryotic cells lack

All of these
nuclear membrane
membrane bound by organelles
nucleolus

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Biology
Which group of animals was the first to evolve to fly

Birds
Insects
Reptiles
Mammals

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Biology
During the metaphase and anaphse stages of cell division,each chromosome comprises of two unseparated replicas known as the

Tetrads
Plastids
Chromatids
Chiasmata

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Biology
Which of the following is not a function of saliva?

Moistens food and helps stick it together to make it easier to swallow
Begins the chemical breakdown of starches
Contains fluoride to harden the tooth enamel
Helps clean the mouth

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Biology
In blue green algae the cells specilized for nitrogen fixation are known as

Red brown algae
Mosses
Ferns
Blue green algae

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