The surface of a nucleus is bounded by a special kind of membrane called the ________.
What will be an ideal response?
nuclear envelope
envelope
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In the vascular bundles of most dicot stems, primary phloem differentiates toward the ________of the stem, while primary xylem differentiates toward the ________of the stem.
A. middle; outside B. cork cambium; vascular cambium C. outside; middle D. shoot tip; roots E. middle; middle
What is the term for the volume of air moved into the lungs every minute?
A) alveolar ventilation B) minute ventilation C) tidal volume D) pulmonary ventilation E) total lung capacity
Why are modern light microscopes better than the ones Leeuwenhoek used?
A) Modern microscopes have a fivefold better resolution. B) Modern microscopes are compound instead of simple. C) Modern microscopes have lenses with smaller numerical apertures. D) Modern lenses are made of prisms. E) Modern microscopes are compound and have fivefold better resolution.
What category of germicide has been used to create "self-disinfecting" surfaces?
A. Phenolics B. Hydrogen peroxide C. Ethylene oxide D. Heavy metals E. Alcohols