Vaccines are effective in preventing diseases because they? A. Interfere with the release of suppressor T cells B. Are antibodies directed against specific pathogens C. Contain specific B cells and T cells D. Trigger antibody formation

Which of the following are reactants in the process of cellular respiration?

Reword the following statement to make it true: The orderly flow of carbon through the TCA cycle is possible because each of the enzymes of the cycle is embedded in the inner mitochondrial membrane in such a manner that their order in the membrane

What happens a few days after fertilization? A. The baby can be felt moving. B. The eyes have developed. C. A zygote forms. D. The placenta begins to form. -Apex

Which of the following resources is a nonrenewable resource? a. Gold b. River c. Carbon d. Tree

How many chromosomes does a child inherit from his or her parents? O 23 from the mother and 23 from the father 46 from the mother 46 from the father O 46 from the mother and 46 from the father

How many alleles for each gene are present in somatic cells? what about in gametes?

Pseudomonas A. are resistant to many disinfectants and antimicrobials. B. are mostly harmless except for the opportunistic P. aeruginosa. C. require nutrient rich environments. D. do not contain plasmids. E.

How can a predator's preference of prey impact competition in an ecosystem?

An area of land that is covered with a shallow layer of water during some or all of the year is called

The world human population is currently about (A) 7 billion people. (B) 6 billion people (C) 7 million people. (D) 6 million people.