In an Attempt to Find Out Where a Growing Plant

question 39

Multiple Choice

In an attempt to find out where a growing plant gets its mass,van Helmont planted a willow seedling in a pot of soil.After five years,the willow weighed 76.8 kg,and the soil had lost 0.06 kg of weight.Only water had been added to the pot.Which of the following conclusions should van Helmont have drawn?

• A)Plants get their mass from water and atmospheric CO2.
• B)Plants get all or almost all of their mass from a source other than soil.
• C)Plants get their mass from water and air.
• D)Plants get their mass from water.

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Definitions:

Brachial Plexus

A network of nerve fibers that run from the spine, through the neck, to the arm, and to the hand, controlling muscle movements and sensation.

Axillary

Pertaining to the armpit area, including structures located within or related to the armpit, such as the axillary artery, vein, and lymph nodes.

Median

The middle value or number in a set of data when it is ordered in ascending or descending order.

Radial

relates to the radius bone or the radial artery, often referring to structures extending like a radius from a center.