This is an ability of a plasma membrane to allow some substances to cross across the membrane more easily than others.

Cyanobacteria and green algae are similar to plants. Why they are similar to plants but are not classified as plants?

Of the three key building blocks of dna, which type (s) of building block is/are negatively charged and oriented on the outside of the double helical structure?

Describe the two Native American empires that fell to the Spanish. Include their locations, ways of living, leaders, accomplishments, and weaknesses.

A breeder performs a test cross to determine the genotype of a black cat. he crosses the black cat (BB or Bb) with a white cat (bb). if 50 percent of the offspring are black, what is the genotype of the black cat

If type AB blood has type A in it, explain why a person with type A blood cannot have a transfusion of type AB blood?

What substances move freely through the shell of the egg?

Fossil records suggest major changes in early vascular plants that favored the evolution of land plants. Which was one of these major changes? Select one of the options below as your answer: A. Development of fruit B. Development of seed C.

What deep sea mining is

Three general patterns of population dispersion are

State how matter moves through the biosphere. State how energy moves through the biosphere. Explain each statement using examples to illustrate your explanation