If the producers in an ecosystem provide 100,000KJ of energy, approximately how much of the original energy is available for the secondary consumers?

A new pesticide that inhibits egg cell development in cockroaches is being widely used in U.S. homes. As predicted, a number of common cockroach species have dramatically declined. However, one species of cockroach initially declined but is now more common than it was before the new pesticide was released. Which of the following is most likely true about this species of cockroach?

How might the overuse of antibiotics lead to resistant strains of bacteria?

Which process helps increase genetic diversity and variation within species?

A mountain ridge was excavated by a mining company. The miners removed all vegetation and topsoil from the site. Which of the following sequences is most likely once the mining ends?

Study the nucleotide sequence: AGTACGC. Which nucleotide sequence below represents the corresponding portion of an RNA strand formed from the sequence?

Which of these organisms is most likely to be a pioneer species during primary ecological succession?