Snapping division occurs in bacteria with a two-layered cell wall because only the ________ layer grows inward to generate a septum. 

Fill in the blank(s) with the appropriate word(s).


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Biology & Microbiology

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In a developing human embryo, the hands and feet resemble mittens, with cells and tissues present between the fingers and toes. When a baby is born, these cells are not present, resulting in distinct fingers and toes. In the development of fingers and toes these cells were lost by ____.

A. cell connections B. cell migration C. apoptosis D. cell division E. cell morphology

Biology & Microbiology

Proteins whose conformations change when they are bound to an effector molecule are called

A) enzymes. B) allosteric proteins. C) regulatory proteins. D) activator proteins. E) inhibitory proteins.

Biology & Microbiology

Cardio-cerebral resuscitation (CCR) differs

from CPR in what way?

a. in CCR, an electrical shocking device is used but not in CPR b. in CPR, an electrical shocking device is used but not in CCR c. in CCR, mouth-to-mouth resuscitation is used but not in CPR d. in CPR, mouth-to-mouth resuscitation is used but not in CCR e. CCR is not as effective as CPR

Biology & Microbiology

Which of the following can be used as vectors for cloning DNA fragments?

A. Cosmids B. Bacteriophages C. Plasmids D. All of the choices are correct.

Biology & Microbiology