Which part of an amino acid is the only one that varies and is what defines its properties? A. The amino group B. The R group C. The carboxylic acid group D. The nitrogen base

When a large volcano like Mt. St. Helen erupts, all life in the surrounding area is destroyed. The lava flows and forms new rock in the surrounding area. After several years, organisms, such as lichens and moss begin to recolonize the area.

Which statement best describes how the carbon atom's bonding tendencies lead to the formation of macromolecules? a) It links with water because water holds the macromolecules together making them more complex.

Why every year people change their technology?

A change occurring in a pregnant woman that is indicative of a potential disorder is a. increased urinary protein. b. 30% to 40% increase in cardiac output. c. increased metabolic rate. d. increased oxygen consumption.

What is meant by extinction

Consider an experiment in which an Hfr strain of E. coli bacteria with the StrS, his+, met + alleles in its genome is mixed with an F - strain of E. coli with the StrR, his-, and met - alleles in its genome.

All fingerprints are invisble to the naked eye

These are organism that come from the same cell and are genetically identical to one another

The atmosphere will likely contain more carbon dioxide and less oxygen in the future A. if all coal burning power plants are replaced by wind turbines. B. if the rate of deforestation continues to increase. C.

8. What aspects of the experiment should Victor have held constant?