Permanent Streams in Desert Regions Are Rare, and When They

question 34

Multiple Choice

Permanent streams in desert regions are rare, and when they do occur,______ .

• A) they have numerous tributaries to keep them supplied with water as they cross the desert
• B) they originate outside of the desert region and have few tributaries in the desert
• C) they get their water from wadis and arroyos
• D) they originate in a glacier region

---

Definitions:

Coleoptile

The protective sheath covering the emerging shoot in monocotyledons, such as grasses and cereals.

Eudicot Cotyledon

One of the two major groups of angiosperms (flowering plants) characterized by embryos with two cotyledons or "seed leaves."

Triploid Endosperm

A tissue in seeds of flowering plants that is formed during fertilization and nourishes the developing embryo with a triple set of chromosomes.

Monocot Embryo

An embryo found in monocotyledon plants, characterized by having a single seed leaf.