Which statement about the polarity of DNA strands is true? A) The 3' end has a free OH groupB) The 5' end has a free OH groupC) The 3' end has a free phosphate group

What are the 8 characteristics of life?

Environmental science, check my answers? 1. Most familiar life forms live in regions of biomes that humans inhabit. True < False 2. Biodiversity is the variety of life forms that exist or existed in the past. True < False 3.

A student creates a physical model of the inside of the small intestine. the model is made up of long balloons packed closely together inside a shallow box. what does the model show about how the small intestine serves the needs of the organism?

Is a bone fragment an example of physical contamination?

Why is the 10% rule important within an ecosystem/food chain?

Which system and rationale best pairs with the musculoskeletal system to ensure fluid movement of the human body? 1. the digestive system, to obtain the energy that is needed to move the muscles with smooth, coordinated effort 2.

What is a weak, temporary bond

Why does the need for living space cause problems for some organisms?

Name two factors that will determine whether a non native species becomes an invasive species

Soaps, by themseives, are examples of a. surfactants. b. degerming agents. c. antiseptes d. both a and b.