The Poor Soil of Tropical Rain Forests Is Due to

question 18

Multiple Choice

The poor soil of tropical rain forests is due to

• A)poor quality substrate,such as bedrock that lacks iron and phosphorus.
• B)intense sunlight bleaching the substrate.
• C)lack of litter; the leaves never fall to the ground.
• D)lack of freezing cold to break apart the substrate bedrock.
• E)high temperatures that allow rapid decomposition and rapid recycling of nutrients.

---

Definitions:

Voltage-Gated Channel

A type of protein channel in cell membranes that opens or closes in response to changes in electrical membrane potential.

Synaptic Vesicle

Secretory vesicle in the presynaptic terminal containing neurotransmitter substances.

Chemical Synapse

A specialized junction at which a neuron communicates with a target cell across a synaptic cleft using chemical messengers.

Presynaptic Terminal

The end of a nerve fiber where the release of chemicals (neurotransmitters) occurs, enabling the transfer of the signal to another neuron's receptor site.