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This structure is able to withstand harsh environmental stress:

Site of active cell division that gives rise to xylem and phloem over multiple growing seasons:

Mycorrhizae and Lichens form this type of relationship:

In nonvascular plants, the ___________ is dominant.

Structure that Reptiles, Birds, and some Mammals have in common:

A condition where an organism’s internal metabolism is directly affected by the temperature of its surroundings:

Class that is associated with the cartilagenous fish:

Which of the following is not a general characteristic of Mammalia?

Sea stars contain a __________, which they evert outside their body to begin digesting food externally.

This part of the mollusk is adapted for locomotion, attachment and capturing food: