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A period of inactivity in a plant or plant part even though environmental conditions may be met is

Which type of carbon fixation type occurs at night  ?

Necessary for Vitamin B12 absorption, ________  is/are secreted by ________ cells.

The small intestine uses segmentation to mix chyme with digestive enzymes, increase its contact with the mucosa, and propel it forward through the digestive tract. 

The small intestine uses segmentation to mix chyme with digestive enzymes, increase its contact with the mucosa, and propel it forward through the digestive tract. 

What is the least common but most dangerous form of lung cancer?

The large intestine absorbs water, fats, and salts.

How is the vital capacity calculated?

Pepsinogen is produced by ________ and is activated by ________, which is secreted by ________.

The rate of oxygen diffusion is affected by the pressure gradient of carbon dioxide.