Which one of the following features of Archaeopteryx clearly demonstrates that it was on the evolutionary line leading from dinosaurs to birds?
A. egg-laying ability
B. teeth
C. feathers
D. bony tail
E. claws on forelimbs
C. feathers
Biology & Microbiology
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Which structure is not part of the shoot system?
(a) stems. (b) leaves. (c) lateral roots. (d) axillary buds.
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Which neurotransmitter opens ligand-gated sodium channels?
a. GABA b. cortisol c. ecdysone d. acetylcholine e. brassinosteroid
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Which of these scientist(s) was/were involved in, among other things, investigating the idea of spontaneous generation?
A. Redi B. van Leeuwenhoek C. Pasteur D. Escherich E. Redi AND Pasteur
Biology & Microbiology