Organisms evolve over generations to become adapted to the environmental conditions to which they are exposed. The diversity of organisms that

occurs in any particular area thus may be largely determined by the abiotic factors limiting survivorship and reproduction of organisms in a region. Which of the following limit the range of Saguaro cactus in North America?

I) pollinators

II) sunlight

III) precipitation

IV) temperature

TLS Online TPP Program

#Question id: 14964

#Unit 2. Cellular Organization

The resistance of the tubercle bacillus to various factors is probably due to its

TLS Online TPP Program

#Question id: 14965

#Unit 2. Cellular Organization

An exotoxin is a toxin secreted by bacteria. It can cause damage to the host by destroying cells or disrupting normal cellular metabolism. They are highly potent and can cause major damage to the host. Exotoxins may be secreted by bacteria which

TLS Online TPP Program

#Question id: 14966

#Unit 2. Cellular Organization

The bacterial cell wall is composed of a macromolecular network called peplidoglycan (also known as murein) which is present either alone or in combination with other substances

TLS Online TPP Program

#Question id: 14967

#Unit 2. Cellular Organization

Clinically, the cell wall is important because it contributes to the ability of some species to cause disease and is the site of action of some antibiotics. In addition, the chemical composition of the cell wall is used 

TLS Online TPP Program

#Question id: 14968

#Unit 2. Cellular Organization

What compound provide much of the wall's antigenic specificity and thus make it possible to identify gram-positive bacteria by certain laboratory tests

TLS Online TPP Program

#Question id: 14969

#Unit 2. Cellular Organization

 A new drug is developed that targets and binds to the lipid A portion of LPS from Gram negative bacterial cells. This drug shows a high degree of activity and binding in a test tube setting against purified lipid A. Based on this information,