The structure of DNA resembles a twisted ladder. Which structural components form the rings of the ladder?

A) deoxyribose sugars

B) phosphate groups

C) nitrogenous base pairs

D) ribosomes

Tables display data in rows and columns true or false

Which below participate in muscle movement? 1, 2, 3, or 4? 1. AMP and potassium 2. ATP and calcium 3. ATP and potassium 4. AMP and calcium

Unlike forests, the burning of grasslands is never beneficial. a. True b. False

Which disease produces too much of mucus?

1. Key Concept Sequence the levels of organization in multicellular organisms.

Which of the following is a constructive process? deposition detachment transport plucking

Coal deposits were formed from? A. Plant life in ancient B. Ancient plankton and marine life C. Freshwater organisms from the last 100,000 years D. Modern plants and animals

According to the Hardy-Weinberg principals, which of the following can prohibit genetic equilibrium?

Rickettsia are obligate intracellular parasites that are transmitted by arthropods. In which of the following places would you most likely find the parasites living in the host organism during the course of infection? A.

How are viruses able to move between species?