A site of negative genetic regulation where binding by repressor blocks transcription is the  

A.  operon.
B.  repressor.
C.  promoter.
D.  operator.
E.  CAP.


D.  operator.

Biology & Microbiology

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Among animals, oviparity can be found in (select all correct choices):

A. birds. B. reptiles. C. mammals. D. amphibians. E. insects.

Biology & Microbiology

In most eudicots, a short stalk called a ____ attaches the leaf to a stem

a. vascular bundle b. petiole c. node d. bundle sheath e. stomata

Biology & Microbiology

If calcium ions, each of which has a charge of Ca++, moved into a neuron, and no other ions were moving, what would be true

What will be an ideal response?

Biology & Microbiology

All animals with tissues have

A) three germ layers. B) radial symmetry. C) bilateral symmetry. D) symmetrical bodies. E) two germ layers.

Biology & Microbiology