If We Think of the DNA Double Helix as a Twisted

question 29

Multiple Choice

If we think of the DNA double helix as a twisted ladder,what makes up the rungs or steps of the ladder?

• A)phosphate groups only
• B)alternating phosphate groups and sugars
• C)sugars only
• D)purines and pyrimidines
• E)phosphate groups and bases

Recognize typical characteristics of Maya art and architecture.

Define and describe the forms and functions of ancient American ornaments and artifacts.

Understand the purposes and methods of Maya rituals and ceremonies.

Explain the mechanisms of cultural and iconographic diffusion in ancient American civilizations.

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Definitions:

Liverworts

Simple, non-vascular plants belonging to the division Marchantiophyta, found in moist, shady environments and playing roles in ecosystems as pioneer species.

Sago Palms

Tropical plants of the genus Cycas, known for their large compound leaves and the production of sago, a starch extracted from their trunks.

Tree Ferns

Ancient group of plants with large leaves and a trunk resembling a tree, thriving mostly in tropical and subtropical regions.

Cycads

Slow-growing, palm-like plants from the order Cycadales, known for their large compound leaves and production of cones.